William Witkowski

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Harborcreek, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Plastic baseball bat and method of making the same
- Patent number 4,541,629
- Issue date Sep 17, 1985
- William Witkowski
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Plastic bowling pin and method of making the same
- Patent number 4,457,511
- Issue date Jul 3, 1984
- William Witkowski
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL