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- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- [1941.]
- SuDoc number:
- C 21.12:940/errata 940-2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1941.]
- SuDoc number:
- C 21.12:940/errata 941
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.12:940
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1940-41
- SuDoc number:
- C 21.12:940/p.51, rev., etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.12:940/p.67-68, rev., etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- [1940.]
- SuDoc number:
- C 21.12:940/errata 940
- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- 1940
- SuDoc number:
- C 21.12:940/p.35-36, rev., etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1939
- SuDoc number:
- C 21.12:929/p.63-64, rev./p.64A-64B, etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1939
- SuDoc number:
- C 21.12:929/p.155-156, rev.-2.etc.
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- 1939
- SuDoc number:
- C 21.12:929/p.81-82/rev., etc.