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- 2204640 2
- Elmer E. Woodward propeller engine governor patent 2204640
- 2204640 3
- 2204640 4
- 2204640 5
- 2204640 6
- 2204640 7
- 2204640 8
- Elmer Woodward's propeller engine governor patent number 2,204,640
- Elmer E. Woodward's propeller engine governor patent 2204640
- 22 5 DAVIS TURBINE SIZE D WGC COMP TYPE GOVERNOR CA 1926