Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Yasuo Yamasaki — 45 Patents

Hitachi: 14 patents #2,892 of 28,497Top 15%
SESeiko Epson: 11 patents #1,668 of 7,774Top 25%
TITeijin Petrochemical Industries: 9 patents #3 of 17Top 20%
Brother Kogyo: 6 patents #1,178 of 2,767Top 45%
Sumitomo Electric Industries: 1 patents #13,249 of 21,551Top 65%
Kabushiki Kaisha Toshiba: 1 patents #13,641 of 21,451Top 65%
HMHitachi Maxell: 1 patents #659 of 1,211Top 55%
IKIshihara Sangyo Kaisha: 1 patents #244 of 403Top 65%
SISumitomo Electric Device Innovations: 1 patents #123 of 208Top 60%
Yokohama, JP: #1,621 of 49,234 inventorsTop 4%
Overall (All Time): #64,393 of 4,157,543Top 2%
45 Patents All Time
Yasuo Yamasaki has been granted 45 US patents while listed as an inventor at Hitachi. The first was granted in 1981 and the most recent in December 2018. Yasuo Yamasaki ranks #64,393 of 4,157,543 US inventors in our database (top 1.5%). Patent records list Yasuo Yamasaki in Yokohama, JP.

Patents per Year

Patents granted per year, 1981 to 2018Bar chart with a peak of 8 patents in 2010.peak 81981: 1 patents19811982: 2 patents1983: 1 patents1984: 1 patents19841985: 2 patents1987: 1 patents1990: 1 patents19901991: 1 patents1994: 1 patents1996: 1 patents19961999: 1 patents2006: 1 patents2007: 3 patents20072008: 1 patents2009: 1 patents2010: 8 patents20102011: 1 patents2012: 4 patents2013: 2 patents20132014: 3 patents2015: 4 patents2016: 2 patents20162017: 1 patents2018: 1 patents2018

Issued Patents All Time

Showing 1–25 of 45 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10156717 Electro-optical device, method of manufacturing electro-optical device, electro-optical unit, and electronic apparatus 2018-12-18
9547169 Electro-optical device, method of manufacturing electro-optical device, electro-optical unit, and electronic apparatus 2017-01-17
9397473 Laser diode and transmitter module Nobumasa Okada 2016-07-19
9307111 Image reading device 2016-04-05
9154656 Image reading device 2015-10-06
9118800 Image reading apparatus 2015-08-25
9019578 Image reading apparatus and image forming apparatus Hiroyuki Shingai, Takayuki Akimatsu 2015-04-28
9013766 Image reading apparatus capable of providing improved layout of wiring cable Hiroyuki Shingai 2015-04-21
8922848 Reading unit and image reading apparatus 2014-12-30
8749001 Electronic component, electronic device, and method of manufacturing the electronic component Terunao Hanaoka, Akinori Shindo, Seiichi Chiba, Toshiyuki ENTA, Shuji KOJIMA 2014-06-10
8631701 Sensor device, motion sensor, and electronic device Seiichi Chiba, Shuji KOJIMA, Toshiyuki ENTA, Akinori Shindo, Terunao Hanaoka 2014-01-21
8543602 Access controller that controls access to files by using access control list Akihiro Urano, Takaki Nakamura, Hitoshi Kamei, Masakuni Agetsuma 2013-09-24
8533160 NAS system and remote copy method Sadahiro Nakamura 2013-09-10
8260811 Access controller that controls access to files by using access control list Akihiro Urano, Takaki Nakamura, Hitoshi Kamei, Masakuni Agetsuma 2012-09-04
8212356 Semiconductor device having multi-layered wiring layer and fabrication process thereof 2012-07-03
8145605 NAS system and remote copy method Sadahiro Nakamura 2012-03-27 $164,000
8114788 Method for manufacturing semiconductor device Shuichi Tanaka, Nobuaki Hashimoto 2012-02-14
7910498 Method for manufacturing semiconductor device Shuichi Tanaka, Nobuaki Hashimoto 2011-03-22
7769721 Data recovery method in differential remote backup for a NAS system Atsushi Ueoka 2010-08-03 $61,000
7763536 Method of manufacturing a semiconductor device Hiroki Kato 2010-07-27
7761552 Root node for integrating NAS of different user name spaces Takaki Nakamura, Hitoshi Kamei 2010-07-20 $57,000
7739242 NAS system and remote copy method Sadahiro Nakamura 2010-06-15 $66,000
7719095 Lead frame and semiconductor device provided with lead frame Seigoh Onobuchi 2010-05-18
7680983 Method of restoring data by CDP utilizing file system information Atsushi Sutoh 2010-03-16 $67,000
7647497 Method and program for user authentication in a network storage system Akihiko Sakaguchi, Yohsuke Ishii 2010-01-12 $126,000