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USPTO Patent Rankings Data through Dec 31, 2025
Home › Oki Data › Tetsu Koyama
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Tetsu Koyama — 33 Patents

ODOki Data: 23 patents #9 of 635Top 2%
Nec: 5 patents #2,841 of 14,502Top 20%
OCOki Electric Industry Co.: 4 patents #523 of 2,807Top 20%
NANec Electronics America: 1 patents #8 of 24Top 35%
Overall (All Time): #105,480 of 4,157,543Top 3%
33 Patents All Time
Tetsu Koyama has been granted 33 US patents while listed as an inventor at Oki Data. The first was granted in 1987 and the most recent in January 2024. Tetsu Koyama ranks #105,480 of 4,157,543 US inventors in our database (top 2.5%). Patent records list Tetsu Koyama in Tokyo, CA, JP.

Issued Patents All Time

Showing 1–25 of 33 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
D1009988 Toner cartridge Yoshihiro Goto, Hisatoshi Saito, Shingo Shimada, Akira Saito, Hiroki Haruyama 2024-01-02
D998033 Image drum cartridge Yoshihiro Goto, Hisatoshi Saito, Shingo Shimada, Akira Saito, Hiroki Haruyama 2023-09-05
D984529 Image drum cartridge Yoshihiro Goto, Hisatoshi Saito, Shingo Shimada, Akira Saito, Hiroki Haruyama 2023-04-25
D967891 Toner cartridge Yoshihiro Goto, Hisatoshi Saito, Shingo Shimada, Akira Saito, Hiroki Haruyama 2022-10-25
10606208 Developer container, image formation unit, and image formation apparatus Hisatoshi Saito, Masashi Fujii, Shun Hatanaka 2020-03-31
10466619 Replaceable unit, developing unit, image forming unit, and image forming apparatus Junichi Ito 2019-11-05
10274866 Toner container, image forming unit including the toner container, and image forming apparatus including the toner container Shigenori Koido, Atsushi Ota 2019-04-30
9448530 Developer storage body, image forming unit and image forming apparatus — 2016-09-20
9223249 Image forming unit and image forming apparatus Shingo Shimada 2015-12-29
9217952 Image forming unit and image forming apparatus Shun Hatanaka 2015-12-22
9152125 Image forming unit and image forming apparatus that incorporates the image forming unit — 2015-10-06
8983342 Developer storage container, image forming unit and image forming apparatus Takuya Goto, Junichi Ito, Tatsuya Murakami 2015-03-17
8712294 Image forming unit having agitating portion and image forming apparatus Takuya Goto 2014-04-29
7957682 Image forming unit and image forming apparatus — 2011-06-07
7917059 Developing device and image forming apparatus — 2011-03-29
7522851 Developing device Shinichi Otani 2009-04-21
7437105 Developing device and image forming apparatus — 2008-10-14
7400837 Image recording apparatus — 2008-07-15
7313356 Image forming apparatus — 2007-12-25
D546873 Toner cartridge Shinichi Otani, Masayuki Suzuki, Atsushi Kobayashi, Tetsuji Kojima, Yasushi Nakasone +2 more 2007-07-17
7187876 Image forming apparatus with mechanism to control toner replenishment Junichi Ito, Shinichi Otani 2007-03-06
D529076 Image drum cartridge Atsushi Kobayashi, Shigenori Koido, Masayuki Suzuki, Yasushi Nakasone, Tetsuji Kojima +2 more 2006-09-26
6934490 Toner container, print process cartridge and image forming apparatus Shinichi Otani 2005-08-23
6859508 Four dimensional equalizer and far-end cross talk canceler in Gigabit Ethernet signals Jason Peng, Paul E. Cohen 2005-02-22 $37,000
D501020 Image drum cartridge Shinichi Otani 2005-01-18

Nearby-Ranked Inventors

Mirco Neeser33
Lei Lei33
Gene Hung33
Vernon M. Benson33
Antonio Papageorgiou33
Hisayoshi Daicho33
Lior Raday33
Eswarappa Channabasappa33
Yukiyoshi Oda33