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- Corporate/Agency Authors:
- Patent Office
- Publisher:
- Patent Office
- Date:
- Revised Oct. 1, 1927 1927
- SuDoc number:
- C 21.8:927/2
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Revised Jan. 1, 1927. 1927
- SuDoc number:
- C 21.8:927
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Revised July 1, 1925. 1925
- SuDoc number:
- C 21.8:925