Change-speed gearing.

Invention Grant

US827175A Change-speed gearing. 失效

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Patent Title: Change-speed gearing.
Application No.: US1904229033

Application Date: 1904-10-18
Publication No.: US827175A

Publication Date: 1906-07-31
Inventor: PEARSON WALTER B , ROBERTS CHARLES E
Applicant: STANDARD SCREW
Assignee: Standard Screw
Current Assignee: Standard Screw
Priority: US1902106620 1902-05-09; US1904229033 1904-10-18

Change-speed gearing.

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