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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 22, 1938
- SuDoc number:
- C 21.5/a 2:496/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 15, 1938
- SuDoc number:
- C 21.5/a 2:498/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 8, 1938
- SuDoc number:
- C 21.5/a 2:496/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 1, 1938
- SuDoc number:
- C 21.5/a 2:496/1
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Oct. 25, 1938
- SuDoc number:
- C 21.5/a 2:495/4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Oct. 18, 1938
- SuDoc number:
- C 21.5/a 2:495/3
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Oct. 11, 1938
- SuDoc number:
- C 21.5/a 2:495/2
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Oct. 4, 1938
- SuDoc number:
- C 21.5/a 2:495/1
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Sept. 27, 1938
- SuDoc number:
- C 21.5/a 2:494/4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Sept. 20, 1938
- SuDoc number:
- C 21.5/a 2:494/3