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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:496/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:496/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:496/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:496/5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:496/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:T 775
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:Un 3/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:V 643
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 30, 1937
- SuDoc number:
- C 21.5/a 2:484/5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 23, 1937
- SuDoc number:
- C 21.5/a 2:484/4