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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1940.]
- SuDoc number:
- C 21.5:515/1-4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.5:518/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.5:510/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.5:520/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1939
- SuDoc number:
- C 21.5:509/t.p.&cont.