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For the Inventor, By the Inventor

Tokyo, Japan

Polymer Processing Research Inst., Ltd.


USPTO Granted Patents = 14

Forward Citations = 290

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23 inventors (with patents filed for the assignee):

goldMedal Kazuhiko Kurihara (12 out of 45 patents)

silverMedal Hiroshi Yazawa (12 out of 34 patents)

bronzeMedal Yoichi Mazawa (5 out of 8 patents)

4.  Shuichi Murakami (4 out of 124 patents)

5.  Jun Yamada (4 out of 71 patents)

6.  Kintaro Aihara (4 out of 15 patents)

7.  Toshikazu Ohishi (4 out of 7 patents)

8.  Yuki Kuroiwa (3 out of 12 patents)

9.  Toshikazu Oishi (3 out of 4 patents)

10.  Sadayuki Ishiyama (3 out of 6 patents)

11.  Yukio Matsumura (2 out of 2 patents)

12.  Tadashi Honda (2 out of 6 patents)

13.  Kazuhiro Yabe (1 out of 3 patents)

14.  Shinji Yamazaki (1 out of 4 patents)

15.  Shin'ichi Umejima (1 out of 1 patent)


14 patents:

1. 6132661 - Longitudinally stretched nonwoven fabric and method for producing the (2000-10-17),
2. 6063492 - Adhesive tape and its base fabric (2000-05-16),
3. 6054086 - Process of making high-strength yarns (2000-04-25),
4. 6051175 - Process for producing filament and filament assembly composed of (2000-04-18),
5. 6048808 - Nonwoven fabric and method of making the same (2000-04-11),
6. 5840633 - Nonwoven fabric and method of making the same (1998-11-24),
7. 5826314 - Device for transversely stretching web (1998-10-27),
8. 5789328 - Bulky nonwoven fabric and method for producing the same (1998-08-04),
9. 5312500 - Non-woven fabric and method and apparatus for making the same (1994-05-17),
10. 5307609 - Apparatus for wrapping and method therefor (1994-05-03),
11. 5290377 - Method for producing reticular nonwoven fabric (1994-03-01),
12. 5287742 - Device for detecting defects of web (1994-02-22),
13. 5265506 - Method for fabricating a perforated film and its apparatus (1993-11-30),
14. 5240160 - Rotary splitting tool to fabricate a fibrillated web (1993-08-31),
Company Overview
Polymer Processing Research Institute, Ltd. is a Tokyo-based organization specializing in advanced polymer processing technologies. The institute focuses on developing innovative solutions for various industries, including automotive, electronics, and medical sectors. With a commitment to enhancing material performance and processing efficiency, the organization conducts extensive research in polymer science and engineering. Its expertise encompasses areas such as material characterization, processing techniques, and the development of new polymer-based applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

14 Patents

#1,597 in Tokyo

#3,580 in Japan

#42,249 in the World

Tokyo, JP
Tokyo, Japan

Polymer Processing Research Inst., Ltd.

Forward Citations = 290

23 inventors:

goldMedal Kazuhiko Kurihara (12 out of 45 patents)

silverMedal Hiroshi Yazawa (12 out of 34 patents)

bronzeMedal Yoichi Mazawa (5 out of 8 patents)

4.  Shuichi Murakami (4 out of 124 patents)

5.  Jun Yamada (4 out of 71 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Polymer Processing Research Inst., Ltd.. Retrieved from https://idiyas.com/company/polymer-processing-research-inst

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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