YC

Yi-Fu Chen

Overall (2017): #53,788 of 506,227Top 15%
3
Patents 2017

Issued Patents 2017

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9821441 Ratchet wrench 2017-11-21
9662772 Ratchet wrench 2017-05-30
9592594 Socket wrench with retaining mechanism 2017-03-14