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- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5:495/1-4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.5:493/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5:494/1-4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.5:494/t.p.&cont
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1937
- SuDoc number:
- C 21.5:478/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1937
- SuDoc number:
- C 21.5:479/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1937
- SuDoc number:
- C 21.5:480/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1937
- SuDoc number:
- C 21.5:484/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1937.]
- SuDoc number:
- C 21.5:485/1-4
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1937.]
- SuDoc number:
- C 21.5:479/1-5