YJ

Yen-Ming Jeng

Overall (All Time): #764,753 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
5609802 Helmet making process 1997-03-11
D367548 Rider's helmet 1996-02-27
D367132 Rider's helmet 1996-02-13
D367131 Rider's helmet 1996-02-13
D352802 Rider's safety helmet 1994-11-22
D351684 Rider's safety helmet 1994-10-18
5337421 Air ventilation helmet 1994-08-16