Hideki Maruyama — 20 Patents at Hitachi

Hideki Maruyama has been granted 20 US patents while listed as an inventor at Hitachi. The first was granted in 1983 and the most recent in April 2022. Hideki Maruyama ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Hideki Maruyama in Tokyo, JP.

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
11300210	Mechanical seal	Hiroyuki Ishihara	2022-04-12	$102,000
10253876	Vehicle regenerative speed control device	Takanobu Mouri, Takahiro Yoshino, Yuuzou Kageyama, Masashi Ono, Takuya Ishizuka	2019-04-09
10246077	Vehicle regenerative speed control device	Takanobu Mouri, Takahiro Yoshino, Yuuzou Kageyama, Masashi Ono, Takuya Ishizuka	2019-04-02
10024436	Mechanical seal	Kenji Kiryu, Yasuhiro Ikeda, Kimihiro TANI	2018-07-17
8422351	Optical disk apparatus and driving method thereof	—	2013-04-16
8305851	Optical disk apparatus	Fumio Isshiki	2012-11-06
8208354	Optical disc apparatus, driving method of optical disc apparatus	Toshiteru Nakamura	2012-06-26
8154961	Optical disk apparatus and focus jump method for multilayer optical disk	—	2012-04-10	$126,000
8134902	Optical disc drive apparatus and its control method	—	2012-03-13	$186,000
8121000	Optical disk apparatus	Fumio Isshiki	2012-02-21	$131,000
8077573	Optical disk apparatus and disk identification method	Yukinobu Tanaka	2011-12-13	$143,000
7936652	Optical disc apparatus	Takeshi Ogata	2011-05-03	$133,000
7463275	Light source for image writing apparatus and production method for light source	Tetsuroh Nakamura, Ken-ichi Masumoto, Yuji Toyomura, Takafumi HAMANO, Akira Gyotoku	2008-12-09	$394,000
7093836	Seal device	Hajime Tsuboi	2006-08-22
6962340	Mechanical seal device	—	2005-11-08
6172752	Method and apparatus for simultaneously interferometrically measuring optical characteristics in a noncontact manner	Masamitsu Haruna	2001-01-09	$192,000
6108165	Rotary drum equipment and recording/reproducing equipment using the same	Kenmei Masuda, Kuniaki Hirayama, Yoshio Uemura, Toshihiko Imachi, Kenkichi Inada +1 more	2000-08-22	$339,000
5907162	Light-emitting device and method for manufacturing the same	—	1999-05-25	$303,000
D306211	Combination torch and audible signal with stand	—	1990-02-20
4407186	Flow outlet structure for automotive air conditioner	Masao Izumi, Hiroshi Yoshida	1983-10-04	$4,000

Hideki Maruyama — 20 Patents

Issued Patents All Time

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