Yutaka Ishikawa

Honda Motor Co.: 46 patents #78 of 21,052Top 1%

PE Pentax: 9 patents #192 of 761Top 30%

NE Nec: 6 patents #2,374 of 14,502Top 20%

Sharp Kabushiki Kaisha: 5 patents #3,007 of 10,731Top 30%

SO Sony: 3 patents #10,744 of 25,231Top 45%

Canon: 2 patents #12,681 of 19,416Top 70%

OC Oki Electric Industry Co.: 1 patents #1,459 of 2,807Top 55%

OC Onoda Cement Co.: 1 patents #57 of 155Top 40%

PE Pentax: 1 patents #238 of 396Top 65%

AC Asahi Glass Co.: 1 patents #1,233 of 2,251Top 55%

TO Toyota: 1 patents #15,335 of 26,838Top 60%

HK Honda Giken Koygo: 1 patents #31 of 356Top 9%

TL Toyota Central R&D Labs: 1 patents #823 of 1,657Top 50%

MI Mitutoyo: 1 patents #455 of 721Top 65%

NC Nihon Parkerizing Co.: 1 patents #112 of 330Top 35%

NC Nikkiso Co.: 1 patents #168 of 287Top 60%

Overall (All Time): #24,358 of 4,157,543Top 1%

Patents All Time

Issued Patents All Time

Showing 76–77 of 77 patents

Patent #	Title	Co-Inventors	Date
4957896	Catalyst for purification of exhaust gases	Shinichi Matsumoto, Toru Tanaka, Shinji Matsuura, Hirofumi Shinjoh, Masakuni Ozawa	1990-09-18
4819025	Image forming apparatus	Yuji Takahashi, Yoshimi Yamanaka	1989-04-04