For the Inventor, By the Inventor

Enter assignee name

Polyplastics Co., Ltd.

USPTO Granted Patents = 381

CIPO Patents = 3

EPO Patents = 68

Trademarks = 12

Forward Citations = 3,078

Loading Chart...

Loading Chart...

288 inventors (with patents filed for the assignee):

Kenji Hijikata (59 out of 61 patents)

Toshio Nakane (38 out of 39 patents)

Yukihiko Kageyama (29 out of 29 patents)

4. Hatsuhiko Harashina (19 out of 20 patents)

5. Katsuhiko Takahashi (18 out of 20 patents)

6. Kaoru Yamamoto (16 out of 34 patents)

7. Yoshihisa Tajima (16 out of 16 patents)

8. Hiroaki Konuma (15 out of 15 patents)

9. Yukio Ikenaga (15 out of 18 patents)

10. Hajime Serizawa (14 out of 14 patents)

11. Tomohiro Monma (13 out of 13 patents)

12. Haruji Murakami (13 out of 15 patents)

13. Toshio Kanoe (13 out of 17 patents)

14. Yoshiharu Suzuki (13 out of 13 patents)

15. Kuniaki Kawaguchi (12 out of 12 patents)

Core Competencies:

Polyacetal Resin

Automobile Interior Components

Laser Welding

Vibration-Damping Molded Articles

Polyarylene Sulfide Resin

Flame-Retardant Resins

Cyclic Olefin Copolymer

Dust-Resistant Sliding Members

Thermoplastic Aromatic Polyester

Composite Molded Articles

Corona-Resistant Resin

Integrated Molded Products

381 patents: Sort by Forward Citations

1. 12384078 - Casing member for in-vehicle camera and method of manufacturing the same (2025-08-12),

2. 12305034 - Automobile interior component made from polyacetal resin (2025-05-20),

3. 12257786 - Molded article for laser welding, and agent for suppressing variation in laser transmittance of molded article for laser welding (2025-03-25),

4. 12139601 - Method for improving tracking resistance of thermoplastic resin (2024-11-12),

5. 12043737 - Vibration-damping molded article and method for producing resin composition for vibration-damping molded article (2024-07-23),

6. 12037487 - Polyacetal resin composition and automobile part (2024-07-16),

7. 11932730 - Polyarylene sulfide resin composition, molded article, and optical ferrule (2024-03-19),

8. 11891504 - Polyacetal resin composition and automobile part (2024-02-06),

9. 11795256 - Production method for cyclic olefin copolymer and catalyst composition for copolymerization of norbornene monomer and ethylene (2023-10-24),

10. 11697232 - Metal resin composite-molded article and method for manufacturing same (2023-07-11),

11. 11661511 - Production method of polyacetal resin composition (2023-05-30),

12. 11634576 - Polyacetal resin composition (2023-04-25),

13. 11607868 - Ratchet stack (2023-03-21),

14. 11555111 - Polyacetal resin composition (2023-01-17),

15. 11426903 - Powdery liquid-crystal resin for press-molded article, press-molded article, and production method therefor (2022-08-30),

POLYPLASTICS CO., LTD. is a leading global supplier of engineering plastics. With over 50 years of experience, they provide high-quality materials for a wide range of industries including automotive, electrical and electronics, and consumer goods. Their product portfolio includes various types of engineering plastics such as polyacetal, polybutylene terephthalate, and polyphenylene sulfide. POLYPLASTICS aims to continuously innovate and provide solutions that meet the evolving needs of their customers.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

381 Patents

#197 in Tokyo

#438 in Japan

#2,350 in the World

Polyplastics Co., Ltd.

Forward Citations = 3,078

288 inventors:

Kenji Hijikata (59 out of 61 patents)

Toshio Nakane (38 out of 39 patents)

Yukihiko Kageyama (29 out of 29 patents)

4. Hatsuhiko Harashina (19 out of 20 patents)

5. Katsuhiko Takahashi (18 out of 20 patents)

Please report any incorrect information to support@idiyas.com

Loading…