% Expired Patents = 88.9

EPO Patents = 1

Forward Citations = 21

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10 inventors (with patents filed for the assignee):

Seichin Kinuta (8 out of 9 patents)

Yoshiyuki Ichinosawa (3 out of 3 patents)

Seiji Ito (2 out of 3 patents)

4. Hayao Nakanishi (2 out of 3 patents)

5. Atsushi Nishino (2 out of 67 patents)

6. Akiko Yusa (1 out of 1 patent)

7. Hiroyuki Honda (1 out of 2 patents)

8. Mina Okochi (1 out of 1 patent)

9. Masashi Kobayashi (1 out of 1 patent)

10. Seitin Kinuta (1 out of 1 patent)

11. Hiroyuki Honda (9 patents)

9 patents: Sort by Forward Citations

1. 10814353 - Sieve (2020-10-27),

2. 10641689 - Method of preparing glass slide specimen of cells (2020-05-05),

3. 10022659 - Device for isolating periphery circulating tumor cells or rare cells, and method of isolating periphery circulating tumor cells or rare cells (2018-07-17),

4. 9526882 - Percutaneous administration device and method for producing the same (2016-12-27),

5. 9397325 - Safety vent and electrochemical device (2016-07-19),

6. 9176168 - Probe card (2015-11-03),

7. 8267255 - Sieve, sifting device, solder balls, and method of sifting spherical particles (2012-09-18),

8. 7771788 - Spherical ultrafine particles and process for producing the same (2010-08-10),

9. 6180279 - Method of manufacturing battery explosion prevention safety device (2001-01-30),

Company Overview

Optnics Precision Co., Ltd. is a leading manufacturer of high-precision optical components and assemblies. With over 20 years of experience in the industry, we specialize in the design and production of custom optical solutions for a wide range of applications, including medical devices, defense systems, and scientific instruments. Our state-of-the-art facility is equipped with advanced technologies and a team of skilled engineers and technicians dedicated to delivering products of the highest quality and precision.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

9 Patents

#1 in Ashikaga

#4,696 in Japan

Ashikaga, Japan

Optnics Precision Co., Ltd.

Forward Citations = 21

10 inventors:

Seichin Kinuta (8 out of 9 patents)

Yoshiyuki Ichinosawa (3 out of 3 patents)

Seiji Ito (2 out of 3 patents)

4. Hayao Nakanishi (2 out of 3 patents)

5. Atsushi Nishino (2 out of 67 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Optnics Precision Co., Ltd.. Retrieved from https://idiyas.com/company/optnics-precision-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]

1 patent (EPO):

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]