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- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.10:T 648
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Revised Jan. 1, 1938. 1938
- SuDoc number:
- C 21.2:T 67/938
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.5/3:937
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:489/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:489/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:489/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:489/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:493/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:493/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 3:493/4