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scribed effect; which concealment or addition shall fully appear to have been made for the purpose of deceiving the public, or that the patentee was not the original and first inventor or discoverer of the thing patented, or of a substantial and material part thereof claimed as new, or that it had been de scribed in some public work anterior to the supposed discovery thereof by the patentee, or had been in public use, or on sale with the consent and al lowance of the patentee before his application for a patent, or that he had sur. reptitiously or unjustly obtained the patent for that which was in fact invented or discovered by another, who was using reasonable diligence in adapting and perfecting the same; or that the patentee, if an alien at the time the patent was granted, had failed and neglected for the space of eigh teen months from the date of the patent, to put and continue on sale to the public, on reasonable terms, the invention or discovery for which the patent issued; in either of which cases judgment shall be rendered for the defendant, with costs. And whenever the defendant relies in his defence on the fact of a previous invention, knowledge, or use of the thing patented, he shall state, in his notice of special matter, the names and places of residence of those whom he intends to prove to have possessed a prior knowledge of the thing and where the same had been used: Provided, however, That when. ever it shall satisfactorily appear that the patentee, at the time of making his application for the patent, believed himself to be the first inventor or discoverer of the thing patented, the same shall not be held to be void on account of the invention or discovery, or any part thereof having been before known or used in any foreign country, it not appearing that the same, or any substantial part thereof, had before been patented or described in any print. ed publication. And provided, also, That whenever the plaintiff shall fail to sustain his action on the ground that in his specification of claim is embraced more than that of which he was the first inventor, if it shall appear that the defendant had used or violated any part of the invention justly and truly specified and claimed as new, it shall be in the power of the court to adjudge and award as to costs as may appear to be just and equitable.(1)

2181. Whenever there shall be two interfering patents, or whenever a pa tent on application shall have been refused on an adverse decision of a board of examiners, on the ground that the patent applied for would interfere with an unexpired patent previously granted, any person interested in any such patent, either by assignment or otherwise, in the one case, and any such ap plicant in the other case, may have remedy by bill in equity; and the court having cognizance thereof, on notice to adverse parties and other due proceedings had, may adjudge and declare either the patents void in the whole or in part, or inoperative and invalid in any particular part or portion of the United States, according to the interest which the parties to such suit may possess in the patent or the inventions patented, and may also adjudge that such applicant is entitled, according to the principles and provisions of this act, to have and receive a patent for his invention, as specified in his claim, or for any part thereof, as the fact of priority of right or invention shall in any such case be made to appear. And such adjudication, if it be in favour of the right of such applicant, shall authorize the commissioner to issue such patent, on his filing a copy of the adjudication, and otherwise complying with the requisitions of this act. Provided, however, That no such judgment or adjudication shall affect the rights of any person, except the parties to the action and those deriving title from or under them subsequent to the rendition of such judgment.(2)

2182. All actions, suits, controversies, and cases arising under any law of (1) Act 4th July, 1836, sec. 15.

(2) Ibid. sec. 16.

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the United States, granting or confirming to inventors the exclusive right to their invention or discoveries, shall be originally cognizable, as well in equity as at law, by the circuit courts of the United States, or in any district court having the powers and jurisdiction of a circuit court; which courts shall have power, upon bill in equity filed by any party aggrieved, in any such case, to grant injunctions, according to the course and principles of courts of equity, to prevent the violation of the rights of any inventor as secured to him by any law of the United States, on such terms and conditions as said courts may deem reasonable: Provided, however, That from all judgments and decrees," from any such court rendered in the premises, a writ of error or appeal, as the case may require, shall lie to the supreme court of the United States, in the same manner and under the same circumstances as is now provided by law in other judgments and decrees of circuit courts, and in all other cases in which the court shall deem it reasonable to allow the same.(1)

2183. Whenever any patentee of an invention or discovery shall desire an extension of his patent beyond the term of its limitation, he may make application therefor, in writing, to the commissioner of the patent office, setting forth the grounds thereof; and the commissioner shall, on the applicant's paying the sum of forty dollars to the credit of the treasury, as in the case of an original application for a patent, cause to be published in one or more of the principal newspapers in the city of Washington, and in such other paper or papers as he may deem proper, published in the section of country most interested adversely to the extension of the patent, a notice of such application, and of the time and place, when and where, the same will be considered, that any person may appear and show cause why the extension should not be granted. And the secretary of state, the commissioner of the patent office, and the solicitor of the treasury, shall constitute a board to hear and decide upon the evidence produced before them, both for and against the extension, and shall sit for that purpose at the time and place designated in the published notice thereof. The patentee shall furnish to said board a statement, in writing, under oath, of the ascertained value of the invention, and of his receipts and expenditures, sufficiently in detail to exhibit a true and faithful account of loss and profit in any manner accruing to him from and by reason of said invention. And if, upon a hearing of the matter, it shall appear to the full and entire satisfaction of said board, having due regard to the public interest therein, that it is just and proper that the term of the patent should be extended, by reason of the patentee, without neglect or fault on his part, having failed to obtain, from the use and sale of his invention, a reasonable remuneration for the time, ingenuity, and expense bestowed upon the same, and the introduction thereof into use, it shall be the duty of the commissioner to renew and extend the patent, by making a certificate thereon of such extension, for the term of seven years, from and after the expiration of the first term; which certificate, with a certificate of said board of their judgment and opinion as aforesaid, shall be entered on record in the patent office; and thereupon the said patent shall have the same effect in law as though it had been originally granted for the term of twenty-one years. And the benefit of such renewal shall extend to assignees and grantees of the right to use the thing patented, to the extent of their respective interest therein: Provided, however, That no extension of a patent shall be granted after the expiration of the term for which it was originally issued.(2)

2184. There shall be provided for the use of said office, a library of scientific works and periodical publications, both foreign and American, calculated to facilitate the discharge of the duties hereby required of the chief

(1) Act 4th July, 1836, sec. 17.

(2) Ibid. sec. 18.

officers therein, to be purchased under the direction of the committee of the library of congress. And the sum of fifteen hundred dollars is hereby appropriated, for that purpose, to be paid out of the patent fund.(1)

2185. It shall be the duty of the commissioner to cause to be classified and arranged, in such rooms or galleries as may be provided for that purpose, in suitable cases, when necessary for their preservation, and in such manner as shall be conducive to a beneficial and favourable display thereof, the models and specimens of compositions and of fabrics and other manufactures and works of art, patented or unpatented, which have been, or shall hereafter be deposited in said office. And said rooms or galleries shall be kept open during suitable hours for public inspection.(2)

2186. All acts and parts of acts heretofore passed on this subject, are hereby repealed: Provided, however, That all actions and processes in law or equity sued out prior to the passage of this act, may be prosecuted to final judgment and execution, in the same manner as though this act had not been passed, excepting and saving the application to any such action, of the provisions of the fourteenth and fifteenth sections of this act, so far as they may be applicable thereto. And provided, also, That all applications or petitions for patents, pending at the time of the passage of this act, in cases where the duty has been paid, shall be proceded with and acted on in the same manner as though filed after the passage thereof.(3)

1. Any person who may be in possession of, or in any way interested in any patent for an invention, discovery, or improvement, issued prior to the fifteenth day of December, in the year of our Lord one thousand eight hundred and thirty-six, or in an assignment of any patent, or interest therein, executed and recorded prior to the said fifteenth day of December, may, without charge, on presentation or transmission thereof to the commissioner of patents, have the same recorded anew in the patent office, together with the descriptions, specifications of claim and drawings annexed or belonging to the same; and it shall be the duty of the commissioner to cause the same, or any authenticated copy of the original record, specification, or drawing which he may obtain, to be transcribed and copied into the books of record to be kept for that purpose; and wherever a drawing was not originally annexed to the patent and referred to the specification, any drawing produced as a delineation of the invention, being verified by oath in such manner as the commissioner shall require, may be transmitted and placed on file, or copied as aforesaid, together with the certificate of the oath or such drawings may be made in the office, under the direction of the commissioner, in conformity with the specification. And it shall be the duty of the commissioner to take such measures as may be advised and determined by the board of commis. sioners provided for in the fourth section of this act, to obtain the patents, specifications, and copies aforesaid, for the purpose of being so transcribed and recorded. And it shall be the duty of each of the several clerks of the judicial courts of the United States, to transmit, as soon as may be, to the commissioner of the patent office, a statement of all the authenticated copies of patents, descriptions, specifications, and drawings of inventions and discoveries made and executed prior to the aforesaid fifteenth day of December, which may be found on the files of his office, and also to make out and transmit to said commissioner, for record as aforesaid, a certified copy of every such patent, description, specification, or drawing, which shall be specially required by said commissioner.(4)

Copies of such record and drawings, certified by the commissioner, or,

(1) Act 4th July, 1836, sec 19.

(2) Ibid. sec. 20.

(3) Ibid. sec. 21.

(4) Act 3d March, 1837, sec. 1.

in his absence, by the chief clerk, shall be prima facie evidence of the parti culars of the invention and the patent granted therefor, in any judicial court of the United States, in all cases where copies of the original record or specification and drawings would be evidence, without proof of the loss of such originals; and no patent issued prior to the aforesaid fifteenth day of December, shall, after the first day of June next, be received in evidence in any of the said courts in behalf of the patentee or other person who shall be in possession of the same, unless it shall have been so recorded anew, and a drawing of the invention, if separate from the patent, verified as aforesaid, deposited in the patent office; nor shall any written assignment of any such patent, executed and recorded prior to the said fifteenth day of December, be received in evidence in any of the said courts in behalf of the assignee or other person in possession thereof, until it shall have been so recorded anew.(1)

2. Whenever it shall appear to the commissioner that any patent was destroyed by the burning of the patent office building on the aforesaid fif. teenth day of December, or was otherwise lost prior thereto, it shall be his duty, on application therefor by the patentee or other person interested therein, to issue a new patent for the same invention or discovery, bearing the date of the original patent, with his certificate thereon that it was made and issued pursuant to the provisions of the third section of this act, and shall enter the same of record: Provided, however, That before such patent shall be issued, the applicant therefor shall deposite in the patent office a duplicate, as near as may be, of the original model, drawings, and descriptions, with specification of the invention or discovery, verified by oath, as shall be required by the commissioner, and such patent and copies of such drawings and descriptions, duly certified, shall be admissible as evidence in any judi. cial court of the United States, and shall protect the rights of the patentee, his administrators, heirs, and assigns, to the extent only in which they would have been protected by the original patent and specification.(2)

3. It shall be the duty of the commissioner to procure a duplicate of such of the models destroyed by fire on the aforesaid fifteenth day of December, as were most valuable and interesting, and whose preservation would be im portant to the public; and such as would be necessary to facilitate the just discharge of the duties imposed by law on the commissioner in issuing patents, and to protect the rights of the public and of patentees in patented inventions and improvements: Provided, That a duplicate of such models may be obtained at a reasonable expense: And provided, also, That the whole amount of expenditure for this purpose shall not exceed the sum of one hundred thousand dollars. And there shall be a temporary board of commissioners, to be composed of the commissioners of the patent office and two other persons to be appointed by the president, whose duty it shall be to consider and determine upon the best and most judicious mode of obtain. ing models of suitable construction; and also to consider and determine what models may be procured in pursuance of, and in accordance with, the provisions and limitations in this section contained. And said commissioners may make and establish all such regulations, terms, and conditions, not inconsistent with law, as, in their opinion, may be proper and necessary to carry the provisions of this section into effect according to its true intent.(3) 4. Whenever a patent shall be returned for correction and re-issue under the thirteenth section of the act to which this is additional, and the pa tentee shall desire several patents to be issued for distinct and separate

(1) Act 3d March, 1837, sec. 2.

(2) Ibid. sec. 3.

(3) Ibid. sec. 4.

parts of the thing patented, he shall first pay, in manner and in addition to the sum provided by that act, the sum of thirty dollars for each additional patent so to be issued: Provided, however, That no patent made prior to the aforesaid fifteenth day of December, shall be corrected and re-issued until a duplicate of the model and drawing of the thing as originally invented, verified by oath as shall be required by the commissioner, shall be deposited in the patent office.

Nor shall any addition of an improvement be made to any patent heretofore granted, nor any new patent be issued for an improvement made in any machine, manufacture, or process, to the original inventor, assignee, or possessor of a patent therefor, nor any disclaimer be admitted to record, until a duplicate model and drawing of the thing originally intended, verified as aforesaid, shall have been deposited in the patent office, if the commissioner shall require the same; nor shall any patent be granted for an invention, improvement, or discovery, the model or drawing of which shall have been lost, until another model and drawing, if required by the commissioner, shall, in like manner, be deposited in the patent office.

And in all such cases, as well as in those which may arise under the third section of this act, the question on compensation for such models and drawing, shall be subject to the judgment and decision of the commissioners provided for in the fourth section, under the same limitations and restrictions as are therein prescribed.(1)

5. Any patent hereafter to be issued, may be made and issued to the assignee or assignees of the inventor or discoverer, the assignment thereof being first entered of record, and the application therefor being duly made, and the specification duly sworn to by the inventor. And in all cases hereafter, the applicant for a patent shall be held to furnish duplicate drawings, when. ever the case admits of drawings, one of which to be deposited in the office, and the other to be annexed to the patent, and considered a part of the specification.(2)

6. Whenever any patentee shall have, through inadvertence, accident, or mistake, made his specifiation of claim too broad, claiming more than that of which he was the original or first inventor, some material and substantial part of the thing patented being truly and justly his own, any such patentee, his administrators, executors, and assigns, whether of the whole or of a sectional interest therein, may make disclaimer of such parts of the thing patented as the disclaimant shall not claim to hold by virtue of the patent or assignment, stating therein the extent of his interest in such patent; which disclaimer shall be in writing, attested by one or more witnesses, and recorded in the patent office, on payment by the person disclaiming, in manner as other patent duties are required by law to be paid, of the sum of ten dollars. And such disclaimer shall thereafter be taken and considered as part of the origi. nal specification, to the extent of the interest which shall be possessed in the patent or right secured thereby, by the disclaimant, and by those claiming by or under him subsequent to the record thereof. But no such disclaimer shall affect any action pending at the time of its being filed, except so far as may relate to the question of unreasonable neglect or delay in filing the same.(3)

Whenever application shall be made to the commissioner for any addition of a newly discovered improvement to be made to an existing patent, or whenever a patent shall be returned for correction and re-issue, the speci fication of claim annexed to every such patent shall be subject to revision

(1) Act 3d March, 1837, sec. 5. (2) Ibid. sec. 6.

(3) Ibid. sec. 7.

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