William A. Martell

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Sterling Heights, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making plastic tooling with compression adjustment
- Patent number 5,039,469
- Issue date Aug 13, 1991
- General Motors Corporation
- William A. Martell
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Plastic tooling with compression adjustment
- Patent number 4,976,400
- Issue date Dec 11, 1990
- General Motors Corporation
- William A. Martell
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Tool for molding plastic articles
- Patent number 4,955,804
- Issue date Sep 11, 1990
- General Motors Corporation
- William A. Martell
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Reinforced plastic retainer rings for sheet metal forming and metho...
- Patent number 4,719,786
- Issue date Jan 19, 1988
- General Motors Corporation
- William A. Martell
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of making cast-to-size epoxy tools for stamping sheet metal...
- Patent number 4,601,867
- Issue date Jul 22, 1986
- General Motors Corporation
- William A. Martell
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL