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For the Inventor, By the Inventor

Yamanashi, Japan

Citizen Seimitsu Co., Ltd.

Calculating rank
USPTO Granted Patents = 6

% Expired Patents = 66.7

Forward Citations = 25

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13 inventors (with patents filed for the assignee):

goldMedal Kazuyuki Haneda (4 out of 10 patents)

silverMedal Satoshi Fujinami (2 out of 3 patents)

bronzeMedal Koji Yamabuchi (2 out of 15 patents)

4.  Tomohisa Komoda (2 out of 7 patents)

5.  Kazuya Kaida (2 out of 5 patents)

6.  Takane Horiuchi (2 out of 2 patents)

7.  Shinya Takabe (2 out of 2 patents)

8.  Toshimitsu Furuya (2 out of 2 patents)

9.  Tetsuro Katayama (2 out of 2 patents)

10.  Yosuke Sato (2 out of 2 patents)

11.  Akinori Izumi (2 out of 6 patents)

12.  Takeshi Jonouchi (1 out of 1 patent)

13.  Kunizo Watanabe (1 out of 1 patent)


6 patents:

1. 8137161 - Disk-shaped substrate manufacturing method (2012-03-20),
2. 8033893 - Grinding method of a disk-shaped substrate and grinding apparatus (2011-10-11),
3. 7990495 - Liquid crystal panel having polarizer plates on both surfaces thereof (2011-08-02),
4. 7959492 - Disk-shaped substrate inner circumference polishing method (2011-06-14),
5. 7837536 - Polishing apparatus, polishing brush and manufacturing method of disk-shaped substrate (2010-11-23),
6. 7553390 - Method and device for parting glass substrate, liquid crystal panel, and liquid crystal panel manufacturing device (2009-06-30),
Company Overview
Citizen Seimitsu Co., Ltd. is a precision parts manufacturing company based in Japan. The company specializes in producing high-quality components for various industries such as automotive, electronics, and medical. With over 50 years of experience, Citizen Seimitsu is known for its advanced technology, strict quality control, and commitment to customer satisfaction.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#15 in Yamanashi 400-0862

#5,990 in Japan

Yamanashi, JP
Yamanashi, Japan

Citizen Seimitsu Co., Ltd.

Forward Citations = 25

13 inventors:

goldMedal Kazuyuki Haneda (4 out of 10 patents)

silverMedal Satoshi Fujinami (2 out of 3 patents)

bronzeMedal Koji Yamabuchi (2 out of 15 patents)

4.  Tomohisa Komoda (2 out of 7 patents)

5.  Kazuya Kaida (2 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Citizen Seimitsu Co., Ltd.. Retrieved from https://idiyas.com/company/citizen-seimitsu-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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