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For the Inventor, By the Inventor

Yokohama, Japan

Ryosuke Kamei

This inventor holds 18 USPTO granted patents, primarily in Polyester Materials. Top assignees: Showa Denko Kabushiki Kaisha, Showa Highpolymer Co., Ltd., Showa Denko K.k.. Active years: 1985-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryosuke Kamei. Retrieved from https://idiyas.com/inventor/ryosuke-kamei

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 4.7

ph-index = 7

Forward Citations = 290(Granted Patents)


Location History:

  • Yokohama, JP (1985 - 1990)
  • Oita, JP (1992)
  • Kawasaki, JP (1994 - 1996)
  • Kanagawa, JP (1994 - 1997)

Company Filing History:

goldMedal9 out of 405 
 
Showa Denko Kabushiki Kaisha
 patents
silverMedal8 out of 68 
 
Showa Highpolymer Co., Ltd.
 patents
bronzeMedal1 out of 1,961 
 
Showa Denko K.k.
 patents

Years Active: 1985-1997

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Areas of Expertise:
Multifilaments
Polyester Resin
Nonwoven Fabric
Foamed Materials
Composite Fibers
Elastic Absorbents
Drinking Straw
Packaging Cloth
High Tenacity
Yarn Production
Absorbent Articles
Fabric Composition
18 patents (USPTO):Explore Patents
1. 5609888 - Apparatus for producing multifilaments (1997-03-11),
2. 5530058 - Polyester resin composition (1996-06-25),
3. 5525409 - Nonwoven polyester fabric (1996-06-11),
4. 5362765 - Polyester foamed thin materials (1994-11-08),
5. 5349028 - Polyester fibers (1994-09-20),
6. 5348700 - Polyester flat and split yarn (1994-09-20),
7. 5321052 - Polyester foamed thin materials (1994-06-14),
8. 5314927 - Polyester foamed articles and method for producing the same (1994-05-24),
9. 5310872 - Polyester tying tape-like materials (1994-05-10),
10. 5283025 - Process for producing multifilaments (1994-02-01),
11. 5171489 - Method of producing composite staple fibers consisting of resin matrix (1992-12-15),
12. 4966809 - Water-absorbing composite body (1990-10-30),
13. 4931005 - Apparatus for the production of elastic absorbent (1990-06-05),
14. 4902463 - Elastic absorbent and process for production thereof (1990-02-20),
15. 4850533 - Telescopic drinking straw (1989-07-25),

Title: Ryosuke Kamei: Innovator in Multifilament Production and Biodegradable Materials

Introduction

Ryosuke Kamei is a prominent inventor based in Yokohama, Japan, known for his significant contributions to the fields of multifilament production and biodegradable materials. With a total of 18 patents to his name, Kamei has made remarkable advancements that have the potential to impact various industries.

Latest Patents

Among his latest innovations is an apparatus for producing multifilaments, which features a spinneret melt that spins polyolefin at a first temperature into filaments. This apparatus includes a cooling duct that cools the filaments via convection at a second temperature, followed by a chill roll that conducts conductive cooling at a third temperature. Finally, heated drawing rolls continuously draw the filaments at a high draw ratio. Another notable patent is his aliphatic polyester resin composition, which boasts a low combustion heat. This composition is characterized by a filler mixed with an aliphatic polyester having a number-average molecular weight of at least 10,000, synthesized from glycol and aliphatic polybasic acid or its derivatives. The resulting sheet formed from this composition exhibits excellent tensile strength, stiffness, and impact strength, while also being biodegradable.

Career Highlights

Ryosuke Kamei has worked with notable companies such as Showa Denko and Showa Highpolymer Co., Ltd.

Profile summary based on public USPTO records.
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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