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For the Inventor, By the Inventor

Kawanishi, Japan

Yoshihiro Hamakawa

This inventor holds 25 USPTO granted patents, primarily in Photovoltaic Technology. Top assignees: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Minolta Company, Ltd., Canon Kabushiki Kaisha. Active years: 1981-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshihiro Hamakawa. Retrieved from https://idiyas.com/inventor/yoshihiro-hamakawa

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

USPTO Granted Patents = 25

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 14

Forward Citations = 604(Granted Patents)


Location History:

  • Kawanishi, Hyogo, JP (1983)
  • Minami-Hanayashiki Kawanishi, Hyogo, JP (1983)
  • Minami-Hanayashiki, Kawanishi, Hyogo, JP (1983)
  • Kawanishi-shi, Hyogo-ken, JP (1981 - 1988)
  • Minamihanayashiki, Kawanishi-shi, Hyogo-ken, JP (1991)
  • Kawanishi, JP (1984 - 2004)

Company Filing History:

goldMedal11 out of 698 
 
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
 patents
silverMedal2 out of 2,816 
 
Minolta Company, Ltd.
 patents
bronzeMedal1 out of 92,901 
 
Canon Kabushiki Kaisha
 patents
4. 1 out of 4 
 
Clean Venture 21 Corporation
 patents
5. 1 out of 1,600 
 
Nippon Soken, Inc.
 patents
6. 1 out of 3,252 
 
Nippondenso Co., Ltd.
 patents
7. 1 out of 8 
 
Osaka Transformer Co., Ltd.
 patents
8. 1 out of 117 
 
Yamatake-Honeywell Co., Ltd.
 patents
9. 8 out of 834,453 
Other
 patents
where one patent can have more than one assignee

Years Active: 1981-2004

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Areas of Expertise:
Photovoltaic Apparatus
Semiconductor Particles
Image Sensing Device
Thin Film Semiconductor
Flexible Photovoltaic Device
Microcrystalline Silicon
Color Sensor
Single Crystal Thin Films
Amorphous Silicon
Heterojunction
High-Voltage Photovoltaic Cell
25 patents (USPTO):Explore Patents
1. 6706959 - Photovoltaic apparatus and mass-producing apparatus for mass-producing spherical semiconductor particles (2004-03-16),
2. 5976906 - Method for manufacturing a solid state image sensing device (1999-11-02),
3. 5942788 - Solid state image sensing device (1999-08-24),
4. 5686734 - Thin film semiconductor device and photoelectric conversion device using (1997-11-11),
5. 5419781 - Flexible photovoltaic device (1995-05-30),
6. 5127964 - Flexible photovoltaic device (1992-07-07),
7. 5021103 - Method of forming microcrystalline silicon-containing silicon carbide (1991-06-04),
8. 4875943 - Flexible photovoltaic device (1989-10-24),
9. 4820915 - Color sensor with amorphous pin structure (1989-04-11),
10. 4773942 - Flexible photovoltaic device (1988-09-27),
11. 4758399 - Substrate for manufacturing single crystal thin films (1988-07-19),
12. 4735396 - Substrate for manufacturing single crystal thin films (1988-04-05),
13. 4717630 - Substrate for manufacturing single crystal thin films (1988-01-05),
14. 4670762 - Amorphous silicon semiconductor and process for same (1987-06-02),
15. 4634601 - Method for production of semiconductor by glow discharge decomposition (1987-01-06),

Title: Yoshihiro Hamakawa - Innovative Inventor from Kawanishi

Introduction: Yoshihiro Hamakawa is a renowned inventor hailing from Kawanishi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Hamakawa holds several patents in the areas of renewable energy, semiconductor devices, and nanotechnology, showcasing his diverse expertise and forward-thinking approach to invention.

Career Highlights: With a career spanning over three decades, Yoshihiro Hamakawa has worked with leading research institutions and companies, consistently pushing the boundaries of technological advancement. His innovative solutions have revolutionized various industries, earning him global recognition.

Collaborations: Throughout his career, Hamakawa has collaborated with top scientists, engineers, and researchers worldwide, fostering a culture of innovation and knowledge exchange. His collaborative efforts have led to the development of cutting-edge technologies that have had a lasting impact on society.

Conclusion: Yoshihiro Hamakawa's passion for innovation and relentless pursuit of excellence have solidified his position as a pioneering inventor in the world of technology. His contributions continue to inspire future generations of inventors and shape the landscape of innovation.

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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