 | Franklin Institute (Philadelphia, Pa.) - 1957 - 700 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1956 - 726 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1955 - 610 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1955 - 618 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1954 - 594 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1954 - 592 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
 | Franklin Institute (Philadelphia, Pa.) - 1952 - 610 էջ
Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-1859. cf. Index to v. 1-120 of the Journal, p. [415] | |
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