Masashi Doi — 24 Patents at IBM

Masashi Doi has been granted 24 US patents while listed as an inventor at IBM. The first was granted in 1986 and the most recent in July 2025. Masashi Doi ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Masashi Doi in Kyoto, JP.

Patents per Year

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Showing 1–24 of 24 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12368397	Motor control device	Takeo Nishikawa, Takeshi Ashida, Hiroyuki Tokusaki, Liangyu SHEN	2025-07-22
11967892	DC power supply device and servo DC power supply system	Takeshi Kiribuchi, Toshiyuki Zaitsu, Takeshi Ashida	2024-04-23	$168,000
11750129	Servo DC power supply system and motor control device	Takeshi Kiribuchi, Toshiyuki Zaitsu, Takeshi Ashida	2023-09-05	$159,000
11671271	Mechanism for the management of topic-based multi-group virtual conferences	Kenya Ishimoto, Yoshio Horiuchi, Koichi Omae	2023-06-06	$14,513,000
11645451	Managing relationships among original, modified, and related messages using significance-level analysis and change-relevancy annotations	Yoshio Horiuchi, Sho Ayuba, Timothy Waileong Koh	2023-05-09	$3,203,000
11630873	Automatic search query for unknown verbal communications	Sho Ayuba, Yoshio Horiuchi, Timothy Waileong Koh	2023-04-18	$12,037,000
10981404	System and apparatus for producing multilayered printed matter	Yuhei Horiuchi	2021-04-20
10958638	Securely sharing confidential information in a document	Kenya Ishimoto, Nobuyuki Yoshifuji	2021-03-23	$2,115,000
10367807	Securely sharing confidential information in a document	Kenya Ishimoto, Nobuyuki Yoshifuji	2019-07-30	$4,347,000
10362025	Securely sharing confidential information in a document	Kenya Ishimoto, Nobuyuki Yoshifuji	2019-07-23	$2,519,000
9811443	Dynamic trace level control	Kenya Ishimoto, Atsushi Naruse	2017-11-07	$4,555,000
9811442	Dynamic trace level control	Kenya Ishimoto, Atsushi Naruse	2017-11-07	$4,555,000
9321287	Printing position and cutting position adjusting method	Tadanori Ipponyari	2016-04-26
9247445	Wireless sensor module, method for processing measurement data thereby, and recording medium	Masahito Honda, Keiki Matsuura	2016-01-26
9089187	Fastener stringer for concealed slide fastener	Akira Takano, Takayuki Hasegawa	2015-07-28
8739372	Fastener stringer for hidden slide fastener	Takayuki Hasegawa, Akira Takano	2014-06-03
7978053	Tag-information management apparatus and IC tag	Akira Nakai	2011-07-12
7419715	Light diffusing films	Yasuhiro Hegi, Kyoji Kitamura, Shinya Okada	2008-09-02
7152283	Noiseless surface fastener member, noiseless surface fastener combined with the noiseless surface fastener member and product attached with the same noiseless surface fastener member or the same noiseless surface fastener	Teiichi Murayama, Shintaro Ohsugi, Akira Ishibashi, Mamoru Tanaka, Yoshihiro Hashizume	2006-12-26
6681457	Fiber surface fastener and method for finishing same	Mitsuhisa Okawa, Norinaka Hirokawa	2004-01-27
6565943	Surface fastener formed of fibers	Yoichi Kondo, Mitsutoshi Ishihara	2003-05-20
6447877	Photosensitive composition and white coating	Yasuhiro Hegi	2002-09-10
6063067	Disposable diaper and method of folding and fastening the same as waste	Toshiaki Takizawa, Tsuyoshi Minato	2000-05-16
4604774	Sliding clasp fastener	Yoshiharu Yamaguchi	1986-08-12

Masashi Doi — 24 Patents

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