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Heng Lye Chang
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Singapore, SG
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last 30 patents
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Patent Grant
System for reducing wear and improving longevity of a electric subm...
Patent number
6,424,066
Issue date
Jul 23, 2002
Camco International, Inc.
Arthur I. Watson
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...