For the Inventor, By the Inventor

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Ohki Co., Ltd.

USPTO Granted Patents = 13

CIPO Patents = 1

EPO Patents = 12

Forward Citations = 56

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18 inventors (with patents filed for the assignee):

Mitsunori Saitoh (9 out of 9 patents)

Naoko Yamaguchi (5 out of 6 patents)

Akiko Miyawaki (3 out of 3 patents)

4. Yoshiyuki Tsuji (2 out of 7 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: Sort by Forward Citations

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),

OHKI CO., LTD. is a leading technology company specializing in providing innovative solutions for businesses. With a strong focus on research and development, we deliver cutting-edge products and services across various industries. Our expertise includes software development, hardware design, and advanced AI technologies. We strive to empower organizations with breakthrough solutions that enhance productivity, optimize operations, and drive growth. Visit our website to learn more about our products and services.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

13 Patents

#350 in Osaka

#3,658 in Japan

#43,635 in the World

Ohki Co., Ltd.

Forward Citations = 56

18 inventors:

Mitsunori Saitoh (9 out of 9 patents)

Naoko Yamaguchi (5 out of 6 patents)

Akiko Miyawaki (3 out of 3 patents)

4. Yoshiyuki Tsuji (2 out of 7 patents)

5. Yoko Mitani (2 out of 2 patents)

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