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Philip A. Lessard
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Boxboro, MA, US
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last 30 patents
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Patent Grant
Cryogenic waterpump
Patent number
5,261,244
Issue date
Nov 16, 1993
Helix Technology Corporation
Philip A. Lessard
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Optimally staged cryopump
Patent number
5,001,903
Issue date
Mar 26, 1991
Helix Technology Corporation
Philip A. Lessard
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Optimally staged cryopump
Patent number
4,896,511
Issue date
Jan 30, 1990
Philip A. Lessard
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...