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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Apr. 5, 1938
- SuDoc number:
- C 21.5/a 2:489/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Mar. 29, 1938
- SuDoc number:
- C 21.5/a 2:488/5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Mar. 22, 1938
- SuDoc number:
- C 21.5/a 2:488/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Mar. 15, 1938
- SuDoc number:
- C 21.5/a 2:488/8
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Mar. 8, 1938
- SuDoc number:
- C 21.5/a 2:488/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Mar. 1, 1938
- SuDoc number:
- C 21.5/a 2:488/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Feb. 22, 1938
- SuDoc number:
- C 21.5/a 2:487/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Feb. 15, 1938
- SuDoc number:
- C 21.5/a 2:487/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Feb. 8, 1938
- SuDoc number:
- C 21.5/a 2:487/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Feb. 1, 1938
- SuDoc number:
- C 21.5/a 2:487/1