Joseph P. Johnson

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Concord, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Cryopump with gas heated exhaust valve and method of warming surfac...
- Patent number 5,906,102
- Issue date May 25, 1999
- Helix Technology Corporation
- Allen J. Bartlett
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Low profile in line cryogenic water pump
- Patent number 5,887,438
- Issue date Mar 30, 1999
- Helix Technology Corporation
- Joseph P. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Gate valve
- Publication number 20070075288
- Publication date Apr 5, 2007
- VARIAN, INC.
- Stephen R Matte
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...