David J. First

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Carlisle, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Device and methods of measuring pressure
- Patent number 8,333,568
- Issue date Dec 18, 2012
- Waters Technologies Corporation
- Joseph A. Luongo
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Control system for screw compressor
- Patent number 4,412,788
- Issue date Nov 1, 1983
- Durham-Bush, Inc.
- David N. Shaw
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Control system for screw compressor
- Patent number 4,249,866
- Issue date Feb 10, 1981
- Dunham-Bush, Inc.
- David N. Shaw
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Device and Methods of Measuring Pressure
- Publication number 20080260558
- Publication date Oct 23, 2008
- Waters Investments Limited
- Joseph A. Luongo
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...