For the Inventor, By the Inventor

Enter assignee name

Junkosha Co., Ltd.

USPTO Granted Patents = 69

Forward Citations = 1,997

Loading Chart...

Loading Chart...

43 inventors (with patents filed for the assignee):

Hirosuke Suzuki (23 out of 30 patents)

Satoru Kobayashi (10 out of 10 patents)

Hiromi Yasumoto (7 out of 9 patents)

4. Haruo Imaizumi (7 out of 7 patents)

5. Yoshiaki Sato (6 out of 31 patents)

6. Juji Akiba (4 out of 5 patents)

7. Satoshi Tanaka (4 out of 4 patents)

8. Hiroyuki Sugibuchi (4 out of 4 patents)

9. Masahiro Suzuki (3 out of 28 patents)

10. Haruo Nomi (3 out of 7 patents)

11. Jyuji Akiba (3 out of 3 patents)

12. Hiroshi Kato (2 out of 89 patents)

13. Tetsuya Hirose (2 out of 11 patents)

14. Takeshi Hoshiko (2 out of 2 patents)

15. Chiharu Harayama (2 out of 2 patents)

Core Competencies:

Composite Filter Material

Coaxial Electrical Cable

Electrical Insulation

Liquid Leakage Detection

Flexible Printed Circuit Board

Superconducting Cable

Multilayer Circuit Board

Fluoropolymer Insulating Material

Temperature Sensor

Leak Detecting Device

Stripline Cable

Porous Dielectric

69 patents: Sort by Forward Citations

1. 5571413 - Composite filter material (1996-11-05),

2. 5525911 - Vertical probe tester card with coaxial probes (1996-06-11),

3. 5457287 - Coaxial electrical cable (1995-10-10),

4. 5393929 - Electrical insulation and articles thereof (1995-02-28),

5. 5308689 - Snag-resistant composite fabric (1994-05-03),

6. 5227742 - Stripline cable having a porous dielectric tape with openings disposed (1993-07-13),

7. 5209275 - Liquid dispensing apparatus and method by sensing the type of liquid (1993-05-11),

8. 5194459 - Fluoropolymer insulating material containing hollow microspheres (1993-03-16),

9. 5165964 - Process for applying deodorant particles to a membrane (1992-11-24),

10. 5136123 - Multilayer circuit board (1992-08-04),

11. 5085863 - Tube provided with a white bismuth salt containing bismuth compound (1992-02-04),

12. 5055064 - Branching connector for a shielded cable (1991-10-08),

13. 4972179 - Liquid leakage detection apparatus including wheatstone bridge (1990-11-20),

14. 4966886 - Superconducting cable with continuously porous insulation (1990-10-30),

15. 4965290 - Low permittivity composite material (1990-10-23),

Company Overview

Junkosha Co., Ltd., based in Tokyo, specializes in advanced electrical insulation technologies. The company focuses on the development and manufacturing of high-performance composite filter materials, coaxial electrical cables, and innovative solutions for liquid leakage detection. Additionally, Junkosha is recognized for its expertise in flexible printed circuit boards, superconducting cables, multilayer circuit boards, and fluoropolymer insulating materials, catering to various industries that demand reliability and efficiency in electrical applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

69 Patents

#677 in Tokyo

#1,418 in Japan

#10,763 in the World

Junkosha Co., Ltd.

Forward Citations = 1,997

43 inventors:

Hirosuke Suzuki (23 out of 30 patents)

Satoru Kobayashi (10 out of 10 patents)

Hiromi Yasumoto (7 out of 9 patents)

4. Haruo Imaizumi (7 out of 7 patents)

5. Yoshiaki Sato (6 out of 31 patents)

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

Loading…