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For the Inventor, By the Inventor

Osaka, Japan

Ohki Co., Ltd.

Calculating rank
USPTO Granted Patents = 13

% Expired Patents = 7.7



Forward Citations = 62

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18 inventors (with patents filed for the assignee):

goldMedal Mitsunori Saitoh (9 out of 9 patents)

silverMedal Naoko Yamaguchi (5 out of 6 patents)

bronzeMedal Akiko Miyawaki (3 out of 3 patents)

4.  Yoshiyuki Tsuji (2 out of 8 patents)

5.  Yoko Mitani (2 out of 2 patents)

6.  Tomohiro Takemoto (2 out of 2 patents)

7.  Fumio Miyahara (2 out of 2 patents)

8.  Ryosuke Hayami (1 out of 1 patent)

9.  Masahiro Nakamuro (1 out of 1 patent)

10.  Nobuhito Yamauchi (1 out of 1 patent)

11.  Takeo Yamamura (1 out of 1 patent)

12.  Hirohumi Iwasaki (1 out of 2 patents)

13.  Hirohiko Nagao (1 out of 1 patent)

14.  Mitsunori Saito (1 out of 1 patent)

15.  Takashi Ishida (1 out of 1 patent)


13 patents:

1. 12161247 - Extraction bag (2024-12-10),
2. 11643270 - Extraction bag (2023-05-09),
3. 10906731 - Drip bag (2021-02-02),
4. 10882688 - Sheet material for extraction, extraction filter, and extraction bag (2021-01-05),
5. 10730692 - Drip bag (2020-08-04),
6. 10548427 - Sheet for extraction, extraction filter, and extraction bag (2020-02-04),
7. 10246252 - Drip bag (2019-04-02),
8. 9732453 - Nonwoven fabric sheet, and extraction filter and extraction bag using the same (2017-08-15),
9. 9650168 - Thread material cutting device (2017-05-16),
10. 8776481 - Packing-packaging apparatus (2014-07-15),
11. 8746131 - Drip bag (2014-06-10),
12. 7498281 - Nonwoven fabric and tea bag (2009-03-03),
13. 7235272 - Drip bag (2007-06-26),
Company Overview
Ohki Co., Ltd. is a Japanese company based in Osaka, specializing in the development and manufacturing of advanced electronic components and systems. The organization focuses on various technology domains, including automation, control systems, and sensor technologies, catering to diverse industries such as automotive, industrial machinery, and consumer electronics. With a commitment to innovation, Ohki continues to enhance its product offerings to meet the evolving needs of its global clientele.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

13 Patents

#409 in Osaka

#3,754 in Japan

#45,104 in the World

Osaka, JP
Osaka, Japan

Ohki Co., Ltd.

Forward Citations = 62

18 inventors:

goldMedal Mitsunori Saitoh (9 out of 9 patents)

silverMedal Naoko Yamaguchi (5 out of 6 patents)

bronzeMedal Akiko Miyawaki (3 out of 3 patents)

4.  Yoshiyuki Tsuji (2 out of 8 patents)

5.  Yoko Mitani (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ohki Co., Ltd.. Retrieved from https://idiyas.com/company/ohki-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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