TU

Toshiaki Umeda

NI Nikon: 7 patents #587 of 2,493Top 25%
Overall (All Time): #762,974 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
5864380 Progressive power lens 1999-01-26
5805265 Progressive lens 1998-09-08
5666184 Progressive power lens Fumio Takahashi 1997-09-09
5557348 Progressive power lens Fumio Takahashi 1996-09-17
5523807 Progressive multifocal lens Yasunori Ueno, Fumio Takahashi 1996-06-04
5510860 Progressive multifocal lens Yasunori Ueno, Fumio Takahashi 1996-04-23
5506630 Progressive multifocal lens Yasunori Ueno, Fumio Takahashi 1996-04-09