Hisao Tanaka

SO Sony: 30 patents #1,169 of 25,231Top 5%

SC Sumitomo Chemical: 12 patents #382 of 4,033Top 10%

Mitsubishi Electric: 8 patents #3,714 of 25,717Top 15%

SE Seiko Epson: 4 patents #3,385 of 7,774Top 45%

Fujitsu Limited: 4 patents #7,093 of 24,456Top 30%

Pioneer: 4 patents #451 of 1,730Top 30%

TC Toyo Ink Mfg. Co.: 2 patents #112 of 499Top 25%

DC Dainippon Ink And Chemicals: 2 patents #241 of 1,002Top 25%

CU Cubic: 1 patents #160 of 329Top 50%

KC Kohjin Co.: 1 patents #36 of 109Top 35%

Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%

TK Toa Nenryo Kogyo: 1 patents #121 of 220Top 60%

TK Tomei Sangyo Kabushiki Kaisha: 1 patents #12 of 35Top 35%

UN Unknown: 1 patents #29,356 of 83,584Top 40%

PA Panasonic: 1 patents #13,264 of 21,108Top 65%

NC Nihon Plast Co.: 1 patents #119 of 253Top 50%

KC Kyowa Hakko Kogyo Co.: 1 patents #549 of 943Top 60%

Nsk: 1 patents #937 of 1,559Top 65%

📍 Nagano, JP: #13 of 38 inventorsTop 35%

Overall (All Time): #24,342 of 4,157,543Top 1%

Patents All Time

Issued Patents All Time

Showing 76–77 of 77 patents

Patent #	Title	Co-Inventors	Date
4421885	Halogen-containing resin composition containing ester plasticizer	Katsuhiro Tsuda, Michio Nagae, Yasuhiko Imanaga	1983-12-20
4317760	Halogen-containing resin composition	Katsuhiro Tsuda, Michio Nagae, Yasuhiko Imanaga	1982-03-02