Peter Hassall

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Stoke-on-Trent, GB

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Patents Grantslast 30 patents

Information Patent Grant
De-sludging systems
- Patent number 5,161,954
- Issue date Nov 10, 1992
- Thomas Willett & Co. Ltd.
- John Matheson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Liquid additive metering
- Patent number 5,104,300
- Issue date Apr 14, 1992
- Thomas Willett & Co., Ltd.
- John Matheson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...