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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.5/a 2:502/1-5
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.5/a 2:508/1-4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.5/a 2:507/1-5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.5/a 2:506/1-4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Dec. 27, 1938
- SuDoc number:
- C 21.5/a 2:497/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Dec. 20, 1938
- SuDoc number:
- C 21.5/a 2:497/3
- 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