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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Dec. 1, 1931
- SuDoc number:
- C 21.5/a 2:413/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 17, 1931
- SuDoc number:
- C 21.5/a 2:412/3
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 10, 1931
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Nov. 3, 1931
- SuDoc number:
- C 21.5/a 2:412/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Oct. 27, 1931
- SuDoc number:
- C 21.5/a 2:411/4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Oct. 20, 1931
- SuDoc number:
- C 21.5/a 2:411/3.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Oct. 13, 1931
- SuDoc number:
- C 21.5/a 2:411/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Oct. 6, 1931
- SuDoc number:
- C 21.5/a 2:411/1
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Sept. 29, 1931
- SuDoc number:
- C 21.5/a 2:410/5
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Sept. 22, 1931
- SuDoc number:
- C 21.5/a 2:410/4