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501. Official gazette of U.S. Patent Office: Patents.

SuDoc number:: C 21.5: (v.nos.&nos.)

502. Official gazette of U.S. Patent Office: Patents.

SuDoc number:: C 21.5: (v.nos.&nos.)

503. Official gazette of U.S. Patent Office: Patents.

SuDoc number:: C 21.5: (v.nos.&nos.)

504. Official gazette, Patent Office [containing patents, trade-marks & designs issued] June 5-Dec. 25, 1951: v. 647, no. 1-v.653, no. 4.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5:647/1-653/4

505. Official gazette, Patent Office [containing patents, trade-marks and designs issued] Jan. 1-June 24, 1952; v. 654, no. 1-v.659, no. 4.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5:654/1-659/4

506. Official gazette, Patent Office [containing patents, trade-marks and designs issued] Jan. 2-May 29, 1951; v. 642, no. 1-v. 646, no. 5.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5:642/1-646/5

507. Official gazette, Patent Office [containing patents, trade-marks and designs issued] July 1-Dec. 30, 1952; v. 660, no. 1-v. 665, no. 5.

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5:660/1-665/5

508. Official gazette, Patent Office [containing patents, trade-marks and designs issued].

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5: (v.nos.&nos.)

509. Official gazette, Patent Office [containing patents, trade-marks and designs issued].

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5: (v.nos.&nos.)

510. Official gazette, Patent Office [containing patents, trade-marks and designs; issued].

Corporate/Agency Authors:: Patent Office and Commerce Dept.
Publisher:: Patent Office
SuDoc number:: C 21.5: (v.nos.&nos.)

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