David E. Roberts

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Flint, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Catalytic converter with air tube
- Patent number 4,256,700
- Issue date Mar 17, 1981
- General Motors Corporation
- Jack E. Smith
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Catalytic converter having a pair of catalyst pellet beds with a pl...
- Patent number 4,238,454
- Issue date Dec 9, 1980
- General Motors Corporation
- David E. Roberts
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Catalytic converter with dual catalyst pellet beds and plenum there...
- Patent number 4,237,099
- Issue date Dec 2, 1980
- General Motors Corporation
- William L. Alley
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Catalytic converter with housing-bed-plenum reinforcing and spacing...
- Patent number 4,237,098
- Issue date Dec 2, 1980
- General Motors Corporation
- David E. Roberts
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES