SY

Shoichi Yokoyama

Sumitomo Electric Industries: 9 patents #3,076 of 21,551Top 15%
NO Nof: 3 patents #95 of 561Top 20%
HI Hitachi: 3 patents #10,712 of 28,497Top 40%
Honda Motor Co.: 3 patents #6,619 of 21,052Top 35%
KT Kabushiki Kaisha Toshiba: 3 patents #8,011 of 21,451Top 40%
PA Panasonic: 2 patents #9,678 of 21,108Top 50%
Mitsubishi Electric: 2 patents #11,187 of 25,717Top 45%
NC Nishikawa Rubber Co.: 1 patents #121 of 246Top 50%
SE Seiko Epson: 1 patents #5,551 of 7,774Top 75%
DE Denso: 1 patents #6,940 of 11,792Top 60%
YC Yachiyo Industry Co.: 1 patents #61 of 139Top 45%
YK Ykk: 1 patents #472 of 845Top 60%
Canon: 1 patents #14,899 of 19,416Top 80%
DA Daikyo: 1 patents #8 of 25Top 35%
Overall (All Time): #144,027 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #TitleCo-InventorsDate
4907646 Heat exchanger Osamu Aoyagi, Hirotada Kaneko, Eiji Nakatsuno, Shotaro Ito 1990-03-13
4723600 Heat exchanger Makoto Obata, Hiroyoshi Tanaka, Yoshiyuki Tsuda, Kaoru Kato, Shigeo Aoyama 1988-02-09