William M. Spence

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Kerens, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Compressor valve
- Patent number 4,193,744
- Issue date Mar 18, 1980
- Nipak, Inc.
- William M. Spence
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...