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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Aug. 9, 1938
- SuDoc number:
- C 21.5/a 2:493/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Aug. 2, 1938
- SuDoc number:
- C 21.5/a 2:493/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- July 26, 1938
- SuDoc number:
- C 21.5/a 2:402/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- July 19, 1938
- SuDoc number:
- C 21.5/a 2:492/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- July 12, 1938
- SuDoc number:
- C 21.5/a 2:492/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- July 5, 1938
- SuDoc number:
- C 21.5/a 2:492/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- June 28, 1938
- SuDoc number:
- C 21.5/a 2:491/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- June 21, 1938
- SuDoc number:
- C 21.5/a 2:491/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- June 14, 1938
- SuDoc number:
- C 21.5/a 2:491/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- June 7, 1938
- SuDoc number:
- C 21.5/a 2:491/1