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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Dec. 13, 1938
- SuDoc number:
- C 21.5/a 2:497/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Dec. 6, 1938
- SuDoc number:
- C 21.5/a 2:497/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 29, 1938
- SuDoc number:
- C 21.5/a 2:496/5
- 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 and Commerce Department
- Publisher:
- Patent Office
- Date:
- Aug. 30, 1938
- SuDoc number:
- C 21.5/a 2:493/5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Aug. 23, 1938
- SuDoc number:
- C 21.5/a 2:493/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Aug. 16, 1938
- SuDoc number:
- C 21.5/a 2:493/3