Donald R. Van Uum

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Davison, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
High efficiency, extended life spark plug having shaped firing tips
- Patent number 5,856,724
- Issue date Jan 5, 1999
- General Motors Corporation
- Randolph Kwok-Kin Chiu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Spark plug with grooved, tapered center electrode
- Patent number 5,821,676
- Issue date Oct 13, 1998
- General Motors Corporation
- Ray William Atchinson
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High efficiency, extended life spark plug having shaped firing tips
- Patent number 5,527,198
- Issue date Jun 18, 1996
- General Motors Corporation
- Randolph K.-K. Chiu
- H01 - BASIC ELECTRIC ELEMENTS