Toru Masuda — 41 Patents at Hitachi

Toru Masuda has been granted 41 US patents while listed as an inventor at Hitachi. The first was granted in 1983 and the most recent in October 2025. Toru Masuda ranks #75,001 of 4,157,543 US inventors in our database (top 1.8%). Patent records list Toru Masuda in Tokyo, JP.

Issued Patents All Time

Showing 1–25 of 41 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12438115	Power semiconductor module	Seiichi Hayakawa, Yuji Takayanagi	2025-10-07
11539361	Semiconductor device signal transmission circuit for drive-control, method of controlling semiconductor device signal transmission circuit for drive-control, semiconductor device, power conversion device, and electric system for railway vehicle	Seiichi Hayakawa, Yuji Takayanagi, Takae Shimada, Takashi Wada	2022-12-27
11496041	Gate drive device, gate drive method, power semiconductor module, and electric power conversion device	Daisuke IKARASHI, Seiichi Hayakawa, Yuji Takayanagi, Masamitsu Inaba	2022-11-08
10888941	Power semiconductor module	Daichi KAWAMURA, Junpei Kusukawa, Naoki Sakurai	2021-01-12
10488515	Acoustic emission wave detection system for a high voltage apparatus	Daichi KAWAMURA, Hiroshi Kageyama, Ayumu Hatanaka	2019-11-26
10115700	Power module, electrical power conversion device, and driving device for vehicle	Ryuusei FUJITA, Satoru Akiyama, Hiroshi Kageyama, Ayumu Hatanaka, Akio Shima	2018-10-30
10002858	Power transistor module	Akitoyo Konno	2018-06-19
8502614	Variable inductor, and oscillator and communication system using the same	Takahiro Nakamura	2013-08-06
8212615	Variable-gain amplifier circuit and wireless communication device integrated circuit equipped therewith	Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio	2012-07-03
8121579	Active mixer circuit and a receiver circuit or a millimeter-wave communication unit using it	Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio, Masamichi Tanabe	2012-02-21	$131,000
7902934	Variable inductor, and oscillator and communication system using the same	Takahiro Nakamura	2011-03-08
7843287	Active resonant circuit with resonant-frequency tunability	Hiroshi Mori	2010-11-30
7839229	Voltage-controlled oscillator and communication device using the same	Takahiro Nakamura	2010-11-23	$82,000
7826814	Frequency synthesizer	—	2010-11-02
7821335	Semiconductor integrated circuit with variable gain amplifier	Nobuhiro Shiramizu	2010-10-26
7642618	Semiconductor devices with inductors	Nobuhiro Shiramizu, Takahiro Nakamura, Nobuhiro Kasa, Hiroshi Mori	2010-01-05	$61,000
7592877	Variable frequency oscillator and communication circuit with it	Nobuhiro Shiramizu	2009-09-22	$96,000
7589596	Voltage controlled oscillator and wireless transceiver using the same	Hiroshi Mori	2009-09-15	$88,000
7518458	Oscillator and data processing equipment using the same and voltage control oscillator and data processing equipment using voltage control oscillator	Takahiro Nakamura, Tomomitsu Kitamura, Norio Hayashi, Hiroshi Mori	2009-04-14	$64,000
7177612	Frequency generator and communication system using the same	Takahiro Nakamura, Kenichi Ohhata	2007-02-13	$171,000
7098740	Radio frequency power amplifier and communication system	Masao Kondo, Katsuyoshi Washio	2006-08-29	$130,000
7091757	Frequency generator and communication system	—	2006-08-15	$115,000
6785477	Optical receiver using variable negative-capacitance circuit	Katsuyoshi Washio, Taizo Yoshikawa, Eiji Ohue, Kenichi Ohhata	2004-08-31	$174,000
6658217	Optical receiver	Kenichi Ohhata, Ryoji Takeyari, Katsuyoshi Washio, Yasushi Hatta	2003-12-02	$161,000
6603029	Partially protected novel trisphenols and process for production thereof	Taiichi Shiomi, Sachiko Miyagi	2003-08-05

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Toru Masuda — 41 Patents

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