Invention Grant
- Patent Title: Variable-speed electric generator.
- Patent Title (中): 变速电力发电机。
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Application No.: US1909526050Application Date: 1909-11-03
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Publication No.: US1039197APublication Date: 1912-09-24
- Inventor: ROTH CHARLES H , WARDER WALTER J JR
- Applicant: ROTH CHARLES H , WARDER WALTER J JR
- Assignee: Charles H Roth,Walter J Warder Jr
- Current Assignee: Charles H Roth,Walter J Warder Jr
- Priority: US1909526050 1909-11-03
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