YK

Yoshio Kawashima

PA Panasonic: 40 patents #308 of 21,108Top 2%
Sumitomo Electric Industries: 8 patents #3,473 of 21,551Top 20%
SI Sumitomo Metal Industries: 4 patents #149 of 1,462Top 15%
SI Sumitomo Heavy Industries: 2 patents #252 of 917Top 30%
Overall (All Time): #50,917 of 4,157,543Top 2%
52
Patents All Time

Issued Patents All Time

Showing 51–52 of 52 patents

Patent #TitleCo-InventorsDate
4823577 Method of feeding material to hot forging machine Shunji Ogata, Masaaki Yokoyama, Masato Tomiku, Tsuneo Yamada, Tsutomu Kuno +5 more 1989-04-25
4761980 Method of feeding material to hot forging machine Shunji Ogata, Masaaki Yokoyama, Masato Tomiku, Tsuneo Yamada, Tsutomu Kuno +5 more 1988-08-09