Donald Hammond Rist

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Erie, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Speed control for electrically propelled traction vehicles
- Patent number 4,012,677
- Issue date Mar 15, 1977
- General Electric Company
- Donald Hammond Rist
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Prime mover speed responsive load control for electrically propelle...
- Patent number 3,970,858
- Issue date Jul 20, 1976
- General Electric Company
- Donald Hammond Rist
- B60 - VEHICLES IN GENERAL