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Erik E. Erlandson
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Roseville, CA, US
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Patents Grants
last 30 patents
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Patent Grant
Check valve
Patent number
6,817,374
Issue date
Nov 16, 2004
Hewlett-Packard Development Company, L.P.
David Onstenk
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Patent Grant
Check valve
Patent number
6,668,849
Issue date
Dec 30, 2003
Hewlett-Packard Development Company, L.P.
David Onstenk
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Patents Applications
last 30 patents
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Patent Application
Check valve
Publication number
20040060593
Publication date
Apr 1, 2004
David Onstenk
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Patent Application
Check valve
Publication number
20030168103
Publication date
Sep 11, 2003
David Onstenk
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...