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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.3:73
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.3:74
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:C 773
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:C 79/2
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:C 824
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.6:937
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:D 493
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:D 563
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:Ea 75