Donald Firth

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Devon, GB

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Patents Grantslast 30 patents

Information Patent Grant
Multiple-choke apparatus for transporting and metering particulate...
- Patent number 5,051,041
- Issue date Sep 24, 1991
- Stamet, Inc.
- Donald Firth
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Multiple-choke apparatus for transporting and metering particulate...
- Patent number 4,988,239
- Issue date Jan 29, 1991
- Stamet, Inc.
- Donald Firth
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...