DS

Der-Fan Shen

Overall (All Time): #663,276 of 4,157,543Top 20%
8
Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
6814099 Flow regulator for water pump 2004-11-09
6631731 Flow regulator for water pump 2003-10-14
6564826 Flow regulator for water pump 2003-05-20
6461104 Flow regulator for a water pump 2002-10-08
6309185 Flow regulator for water pump 2001-10-30
6273126 Flow regulator for water pump 2001-08-14
6192925 Flow regulator for water pump 2001-02-27
6176257 Regulated air suction valve 2001-01-23