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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Jan. 3, 1939
- SuDoc number:
- C 21.5/a 2:498/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.10:B 575
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.10:B 644/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.10:B 644/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.10:B 858/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.10:C 464
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.3:75
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.3:76
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1939
- SuDoc number:
- C 21.6:938
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1939.]
- SuDoc number:
- C 21.5/a 2:503/1-4