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- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- Aug. 17, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- Aug. 11, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- Aug. 10, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- Revised Jan. 1, 1916. Reprint [with changes] Aug. 10, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- Aug. 3, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- July 27, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- July 20, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- July 13, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- July 6, 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- June 29, 1920