Tokyo, Japan

Hiroshi Hayashi

This inventor holds 57 USPTO granted patents and 6 published patent applications and 3 EPO patents, primarily in Display Technology (CPC class H01L). Top assignees: Riso Kagaku Corporation, Idemitsu Kosan Company, Limited, Joled Inc.. Active years: 1980-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Hayashi. Retrieved from https://idiyas.com/inventor/hiroshi-hayashi-jnq9rf3y

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

Calculating rank
USPTO Granted Patents = 57 

% Patents Active = 91.2

 

Average Co-Inventor Count = 2.7

ph-index = 12

Forward Citations = 439(Granted Patents)

Forward Citations (Not Self Cited) = 411(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Sodegaura, JP (1981 - 1986)
  • Chiba, JP (1980 - 1993)
  • Minato-ku, JP (2001)
  • Koganei, JP (2011)
  • Ibaraki-ken, JP (2013)
  • Nishitokyo, JP (2008 - 2017)
  • Tokyo, JP (1981 - 2021)
  • Ibaraki, JP (2015 - 2023)

Company Filing History:

goldMedal11 out of 1,087 
 
Riso Kagaku Corporation
 patents
silverMedal9 out of 2,283 
 
Idemitsu Kosan Company, Limited
 patents
bronzeMedal9 out of 713 
 
Joled Inc.
 patents
4. 7 out of 2,964 
 
Motorola Mobility LLC
 patents
5. 4 out of 2,979 
 
Minolta Camera Kabushiki Kaisha
 patents
6. 4 out of 4,980 
 
Oki Electric Industry Co., Ltd.
 patents
7. 3 out of 20,290 
 
Motorola Corporation
 patents
8. 2 out of 232 
 
Fujikoki Corporation
 patents
9. 2 out of 34,018 
 
Google Inc.
 patents
10. 2 out of 1,556 
 
Mitsubishi Materials Corporation
 patents
11. 2 out of 36,735 
 
Nec Corporation
 patents
12. 1 out of 20,443 
 
Denso Corporation
 patents
13. 1 out of 91 
 
Harada Kogyo Kabushiki Kaisha
 patents
14. 1 out of 42,743 
 
Hitachi, Ltd.
 patents
15. 1 out of 17 
 
Nippon Medical School Foundation
 patents
16. 1 out of 1,238 
 
Panasonic Liquid Crystal Display Co., Ltd.
 patents
17. 1 out of 58,148 
 
Sony Corporation
 patents
18. 1 out of 2,643 
 
The Furukawa Electric Co., Ltd.
 patents
19. 1 out of 39,010 
 
Toyota Jidosha Kabushiki Kaisha
 patents
20. 1 out of 2,887 
 
Victor Company of Japan, Limited
 patents
where one patent can have more than one assignee

Years Active: 1980-2025

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Areas of Expertise:
Display Device
Thin Film Transistor
Semiconductor Device
Inkjet Printing
OFDMA Synchronization
Cell Search
Non-Aqueous Ink
Adaptive Control
Frequency-Hopped Communication
Printer
Treatment Liquid
Waste Electronic Substrate
57 patents (USPTO):Explore Patents

Title: **Hiroshi Hayashi: Innovator in Waste Treatment Technologies**

Introduction

Hiroshi Hayashi is a prominent inventor based in Tokyo, Japan, known for his significant contributions in the field of waste treatment technologies. With an impressive portfolio of 57 patents, Hayashi has pioneered innovative methods for the processing of electronic substrates and coated wires, shaping advancements in recycling and material recovery.

Latest Patents

Hayashi's latest patents highlight his expertise and creativity in dealing with waste materials. One of his notable inventions is a **Method for Treating Waste Electronic Substrate**, which involves carbonizing waste printed circuit boards in a non-oxidizing atmosphere. This process takes place at temperatures ranging from 400° C. to 600° C. and successfully fixes halogen as calcium halide, while also allowing for the separation of mounted parts from the board. The process includes subsequent crushing and sieving to categorize materials into fine calcium compounds, medium-sized particles containing mounted parts, and coarse board pieces.

Another remarkable patent is the **Treatment Method of Coated Wire**, where a resin-coated metal wire is subjected to low-temperature heating alongside an alkali in a non-combustion atmosphere. This innovative approach embrittles the coating resin, which is then crushed and separated from the metal wire, demonstrating Hayashi's commitment to enhancing recycling processes.

Career Highlights

Hiroshi Hayashi has had a rich career, contributing his talents to various esteemed companies, including Riso Kagaku Corporation and Idemitsu Kosan Company, Limited. His innovative mindset and dedication have led to notable advancements in materials processing and recycling, establishing him as a key player in his field.

Collaborations

Throughout his career, Hayashi has collaborated with other notable professionals, including Kevin Lynn Baum and Masaya Fukuta. These partnerships have contributed to his innovative output and the development of impactful technologies aimed at environmental sustainability.

Conclusion

In conclusion, Hiroshi Hayashi stands out as a leading figure in advancing waste treatment technologies. With 57 patents to his name and a profound commitment to innovation, his work is instrumental in addressing the growing challenges of electronic waste recycling. Hayashi's inventions not only demonstrate technical brilliance but also contribute to a sustainable future, paving the way for further advancements in the industry.

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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