Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
MN

Masahiko Niwayama — 22 Patents

Panasonic: 19 patents #1,087 of 21,108Top 6%
Sumitomo Electric Industries: 3 patents #7,735 of 21,551Top 40%
Kyoto, JP: #865 of 11,909 inventorsTop 8%
Overall (All Time): #189,202 of 4,157,543Top 5%
22 Patents All Time
Masahiko Niwayama has been granted 22 US patents while listed as an inventor at Panasonic. The first was granted in 1998 and the most recent in June 2022. Masahiko Niwayama ranks #189,202 of 4,157,543 US inventors in our database (top 4.6%). Patent records list Masahiko Niwayama in Kyoto, JP.

Patents per Year

Patents granted per year, 1998 to 2022Bar chart with a peak of 6 patents in 2014.peak 61998: 1 patents19981999: 1 patents2000: 2 patents20002002: 1 patents2003: 1 patents20032005: 1 patents2007: 1 patents20072009: 1 patents2010: 2 patents20102011: 1 patents2012: 1 patents20122014: 6 patents2015: 2 patents20152022: 1 patents2022

Issued Patents All Time

Showing 1–22 of 22 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11366022 Semiconductor device having a temperature sensor Atsushi Ohoka, Masao Uchida 2022-06-21
9209262 Silicon carbide semiconductor device and method for manufacturing same Koutarou Tanaka, Masao Uchida, Osamu Kusumoto 2015-12-08
9029874 Semiconductor device having a first silicon carbide semiconductor layer and a second silicon carbide semiconductor layer Nobuyuki Horikawa, Masao Uchida 2015-05-12
8878194 Semiconductor element, semiconductor device, and semiconductor element manufacturing method Masao Uchida 2014-11-04
8772788 Semiconductor element and method of manufacturing thereof Ryo Ikegami, Masao Uchida, Yuki Tomita 2014-07-08
8754422 Semiconductor device and process for production thereof Chiaki Kudou, Kenya Yamashita 2014-06-17
8748901 Silicon carbide semiconductor element Kunimasa Takahashi, Masao Uchida, Chiaki Kudou 2014-06-10
8686439 Silicon carbide semiconductor element Kunimasa Takahashi, Masao Uchida, Chiaki Kudou 2014-04-01
8653535 Silicon carbide semiconductor device having a contact region that includes a first region and a second region, and process for production thereof Chiaki Kudou, Ryo Ikegami 2014-02-18
8222107 Method for producing semiconductor element Koutarou Tanaka, Masao Uchida 2012-07-17 $49,000
8058631 Semiconductor manufacturing apparatus Kenji Yoneda 2011-11-15 $95,000
7851871 Semiconductor device and method for fabricating the same Yuji Harada, Kazuyuki Sawada, Masaaki Okita 2010-12-14 $96,000
7759711 Semiconductor device with substrate having increased resistance due to lattice defect and method for fabricating the same Kazuyuki Sawada, Yuji Harada, Saichirou Kaneko, Yoshimi Shimizu 2010-07-20 $105,000
7638782 Semiconductor device manufacturing method and ion implanter used therein Kenji Yoneda 2009-12-29 $191,000
7291535 Method and apparatus for fabricating semiconductor device Kenji Yoneda, Kazuma Takahashi 2007-11-06 $404,000
6875623 Method for fabricating semiconductor device Kenji Yoneda 2005-04-05 $190,000
6633047 Apparatus and method for introducing impurity Hiroko Kubo, Kenji Yoneda 2003-10-14 $301,000
6451674 Method for introducing impurity into a semiconductor substrate without negative charge buildup phenomenon Hiroko Kubo, Kenji Yoneda 2002-09-17 $288,000
6046069 Solid-state image pick-up device and method for manufacturing the same Katsuya Ishikawa, Takao Kuroda, Yuji Matsuda, Keishi Tachikawa 2000-04-04 $389,000
6025210 Solid-state imaging device and method of manufacturing the same Yuji Matsuda 2000-02-15 $963,000
5869854 Solid-state imaging device and method of manufacturing the same Yuji Matsuda 1999-02-09 $202,000
5786607 Solid-state image pick-up device and method for manufacturing the same Katsuya Ishikawa, Takao Kuroda, Yuji Matsuda, Keishi Tachikawa 1998-07-28 $283,000