CH

Chih-Ching Hsieh

Overall (1997): #17,599 of 185,788Top 10%
3
Patents 1997

Issued Patents 1997

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5687623 Reversible socket wrench 1997-11-18
5674036 Screw 1997-10-07
5642649 Screwdriver with wrench engaging collar 1997-07-01