Toru Doi — 23 Patents at Tosoh

Toru Doi has been granted 23 US patents while listed as an inventor at Tosoh. The first was granted in 1980 and the most recent in August 2025. Toru Doi ranks #178,160 of 4,157,543 US inventors in our database (top 4.3%). Patent records list Toru Doi in Yokkaichi, JP.

Issued Patents All Time

Showing 1–23 of 23 patents

Patent #	Title	Co-Inventors	Date
12398223	Method for producing fluororesin particles	Kota SAKAGUCHI, Tomoya SHIMONO, Tomonari NAGAI, Kazunari IWANAGA, Shohei YUMINO +1 more	2025-08-26
12325769	Fluororesin, fluororesin particles, and methods for producing these	Shohei YUMINO, Tomoya SHIMONO, Kota SAKAGUCHI, Tomonari NAGAI, Kazunari IWANAGA +1 more	2025-06-10
11807702	Fluororesin, fluororesin particles, and methods for producing these	Shohei YUMINO, Tomoya SHIMONO, Kota SAKAGUCHI, Tomonari NAGAI, Kazunari IWANAGA +1 more	2023-11-07
9268076	Optical compensation layer, optical compensation film, and processes for producing these	Shinsuke Toyomasu, Sou Ozaki, Shinji Shimosato	2016-02-23
8545970	Optical compensation film and retardation film	Shinji Shimosato, Naoto Obara	2013-10-01
7759451	Fumaric diester copolymer	Kenichi Makita	2010-07-20
7160587	Plastic substrate for display and display element	—	2007-01-09
7090901	Method of making optical compensation film using polymer stablization technique	Liang-Chy Chien	2006-08-15
6506840	Process for producing thermoplastic resin composition	Takeshi Harunari, Yoshiki Uchida	2003-01-14
6111018	Resin composition	Hiroshi Inoue	2000-08-29
5736241	Laminate	Hiroshi Inoue	1998-04-07
5684122	Composite material and process for production thereof	Hiroshi Inoue	1997-11-04
5580928	Resin composition	Hiroshi Inoue	1996-12-03
5548031	Copolymer production process	—	1996-08-20
5541259	Resin composition	—	1996-07-30
5536798	Optical material	Tomohiro Ishikawa	1996-07-16
5512634	Resin composition	—	1996-04-30
5424380	Resin composition	—	1995-06-13
5306794	Method of producing copolymer	Yoshihiko Sugiura	1994-04-26
5238972	Heat-resistant foamed plastic	—	1993-08-24
5208307	Optical material	Tomohiro Ishikawa	1993-05-04
5104428	Separation membrane	Tomohiro Ishikawa, Takayuki Otsu, Akikazu Matsumoto	1992-04-14
4181749	Process for producing surimi	Hiroshi Niki, Tuneo Katou, Eiki Deya, Kenkichi Ahiko, Hiromichi Hayashi	1980-01-01

Toru Doi — 23 Patents

Issued Patents All Time

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