HI

Hirokazu Iwata

Ricoh Company: 34 patents #505 of 9,818Top 6%
NC Nihon Dempa Kogyo Co.: 10 patents #30 of 296Top 15%
TC Toyo Communication Equipment Co.: 5 patents #3 of 111Top 3%
Brother Kogyo: 1 patents #2,155 of 2,767Top 80%
OU Osaka University: 1 patents #681 of 1,984Top 35%
II Icom Incorporated: 1 patents #40 of 74Top 55%
JA Japan Atomic Energy Agency: 1 patents #64 of 251Top 30%
📍 Rifu, JP: #38 of 2,101 inventorsTop 2%
Overall (All Time): #52,533 of 4,157,543Top 2%
51
Patents All Time

Issued Patents All Time

Showing 1–25 of 51 patents

Patent #TitleCo-InventorsDate
11824516 Piezoelectric device and manufacturing method of the same Kenji Shimao, Tetsuya Watanabe, Koji Toshikawa 2023-11-21
11296275 Piezoelectric device, piezoelectric vibrating piece, and method for manufacturing piezoelectric vibrating piece Tetsuya Watanabe, Yoshiharu Sato 2022-04-05
11245249 Reflector, surface emitting laser, method for manufacturing reflector, and method for manufacturing surface emitting laser Takeshi Kawashima, Shunichi Sato, Morimasa Kaminishi 2022-02-08
10840882 Crystal unit and manufacturing method thereof Koji Toshikawa, Shinobu Yoshida, Tetsuya Watanabe, Kazuhiro Hirota, Yoshiro TESHIMA 2020-11-17
10819307 Crystal unit and manufacturing method thereof Yoshiharu Sato, Tetsuya Watanabe, Shinobu Yoshida 2020-10-27
10771038 Crystal unit Koji Toshikawa, Shinobu Yoshida 2020-09-08
10659005 At-cut crystal element, crystal resonator and crystal unit Takayuki Kuwahara, Kenji Shimao 2020-05-19
10529910 Piezoelectric device Yoshiharu Sato 2020-01-07
10333489 Crystal unit Kenji Shimao, Yoshiharu Sato 2019-06-25
10263597 Crystal unit Yoshiharu Sato, Kenji Shimao 2019-04-16
10250225 AT-cut crystal element, crystal resonator and crystal unit Yoshiharu Sato, Yoshiro TESHIMA, Kazuhiro Hirota 2019-04-02
9869033 Production of a GaN bulk crystal substrate and a semiconductor device formed on a GaN bulk crystal substrate Seiji Sarayama, Masahiko Shimada, Hisanori Yamane 2018-01-16
9856575 Crystal growth apparatus and manufacturing method of group III nitride crystal Seiji Sarayama, Akihiro Fuse 2018-01-02
9464367 Method for producing N-type group III nitride single crystal, N-type group III nitride single crystal, and crystal substrate 2016-10-11
9376763 Manufacturing method and manufacturing apparatus of a group III nitride crystal, utilizing a melt containing a group III metal, an alkali metal, and nitrogen Seiji Sarayama, Minoru Fukuda, Tetsuya Takahashi, Akira Takahashi 2016-06-28
9365948 Group III nitride crystal and manufacturing method thereof Seiji Sarayama, Akihiro Fuse 2016-06-14
9222199 Crystal manufacturing apparatus Seiji Sarayama 2015-12-29
9163325 Crystal growth apparatus and manufacturing method of group III nitride crystal Seiji Sarayama, Akihiro Fuse 2015-10-20
9096950 Nitride crystal and method for producing the same Takashi Satoh, Seiji Sarayama, Yusuke Mori, Yasuo Kitaoka 2015-08-04
8888912 Method of producing group III nitride crystal, apparatus for producing group III nitride crystal, and group III nitride crystal Seiji Sarayama, Akihiro Fuse 2014-11-18
8858908 Method for producing N-type group III nitride single crystal, N-type group III nitride single crystal, and crystal substrate 2014-10-14
8829530 Crystal producing apparatus, crystal producing method, substrate producing method, gallium nitride crystal, and gallium nitride substrate Seiji Sarayama 2014-09-09
8623138 Crystal growth apparatus Seiji Sarayama, Hisanori Yamane, Masahiko Shimada, Masafumi Kumano, Takashi Araki 2014-01-07
8591647 Production of a GaN bulk crystal substrate and a semiconductor device formed thereon Seiji Sarayama, Masahiko Shimada, Hisanori Yamane 2013-11-26
8554160 AM transmitter and modulation method using same Shin-ichi Matsuo, Fuminori Kinugawa 2013-10-08