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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 1:496/1-5
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 1:495/1-4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.5/a 1:494/1-4
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1938.]
- SuDoc number:
- C 21.12:929/p.136a/rev.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.5/2:937
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.12:929/p.153-156, rev., etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.12:929/p.19-20, rev., etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938 reprint [with changes]
- SuDoc number:
- C 21.12:929/P 243-244/rev.rep.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.12:929/p 235-236A
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1938
- SuDoc number:
- C 21.12:929/p.109-110 rev./p.110 A