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For the Inventor, By the Inventor

Tokyo, Japan

Jsp Corporation


USPTO Granted Patents = 244

% Expired Patents = 6.1



Trademarks = 17

Forward Citations = 1,517

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141 inventors (with patents filed for the assignee):

goldMedal Masaharu Oikawa (34 out of 34 patents)

silverMedal Hidehiro Sasaki (25 out of 25 patents)

bronzeMedal Hisao Tokoro (21 out of 22 patents)

4.  Satoru Shioya (19 out of 19 patents)

5.  Keiichi Hashimoto (17 out of 17 patents)

6.  Akinobu Hira (17 out of 17 patents)

7.  Tomoo Tokiwa (15 out of 15 patents)

8.  Shota Takagi (15 out of 15 patents)

9.  Mitsuru Shinohara (15 out of 16 patents)

10.  David Lee Pratley (15 out of 15 patents)

11.  Tom Malloy (14 out of 14 patents)

12.  Clive Johnstone (13 out of 13 patents)

13.  Masato Naito (13 out of 13 patents)

14.  Mark Williams (11 out of 11 patents)

15.  Naochika Kogure (11 out of 11 patents)


Core Competencies:
Polypropylene Foam
Thermoplastic Elastomer
Expanded Beads
Safety Helmet
Molded Articles
Polyamide Resin
Composite Materials
Respiratory Protection
Laminated Foam
Vehicle Seat Core
Hearing Protection

244 patents:

1. 12735545 - Polyethylene resin foamed particle, and method for producing same (2026-09-15),
2. D1146014 - Housing for respiratory filter unit for human use (2026-09-01),
3. 12698374 - Polyamide-based resin expanded beads, molded article of polyamide-based resin expanded beads, and method for producing polyamide-based resin expanded beads (2026-08-04),
4. D1131929 - Safety helmet (2026-06-23),
5. D1131780 - Filter housing for air respirator (2026-06-23),
6. 12653261 - Article of headgear, mounting clips, and accessories (2026-06-16),
7. 12649837 - Method for producing polyamide-based resin multi-stage-expanded beads (2026-06-09),
8. 12594699 - Method for producing polypropylene-based resin expanded beads (2026-04-07),
9. 12590176 - Hipe foam and method for producing same (2026-03-31),
10. 12589534 - Polypropylene-based resin expanded beads and molded article thereof (2026-03-31),
11. D1120512 - Safety helmet (2026-03-24),
12. 12570824 - Olefin-based thermoplastic elastomer foamed particle and olefin-based thermoplastic elastomer foamed particle molded body (2026-03-10),
13. 12539652 - Method for manufacturing laminate (2026-02-03),
14. 12503597 - Composite molded article (2025-12-23),
15. 12473415 - Polyolefin-based resin expanded beads, molded article of polyolefin-based resin expanded beads and method for producing polyolefin-based resin expanded beads (2025-11-18),
JSP CORPORATION is a leading global manufacturer of high-performance plastic solutions. With over 50 years of expertise, we specialize in the production of innovative plastic products for various industries including automotive, electronics, healthcare, and more. Our commitment to quality, sustainability, and customer satisfaction drives us to develop cutting-edge solutions that meet the evolving needs of our clients. Visit our website to learn more about our extensive product range and how we can help you achieve your business goals.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 15 2026

Jsp Corporation
244 Patents

#311 in Tokyo

#619 in Japan

#3,540 in the World

Tokyo, JP
Tokyo, Japan

Jsp Corporation

Forward Citations = 1,517

141 inventors:

goldMedal Masaharu Oikawa (34 out of 34 patents)

silverMedal Hidehiro Sasaki (25 out of 25 patents)

bronzeMedal Hisao Tokoro (21 out of 22 patents)

4.  Satoru Shioya (19 out of 19 patents)

5.  Keiichi Hashimoto (17 out of 17 patents)

Please report any incorrect information to [email protected]
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