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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.1/2:937
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1936.]
- SuDoc number:
- C 21.1/2:935
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1935.]
- SuDoc number:
- C 21.1/2:934
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1933.]
- SuDoc number:
- C 21.1/2:933
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1932
- SuDoc number:
- C 21.1/2:932
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1931
- SuDoc number:
- C 21.1/2:931
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1930
- SuDoc number:
- C 21.1/2:930