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For the Inventor, By the Inventor

Toyonaka, Japan

Kohtaro Hayashi

This inventor holds 62 USPTO granted patents, primarily in Projection Optical Systems (CPC class 3544). Top assignees: Minolta Company, Ltd., Minolta Camera Kabushiki Kaisha, Konica Minolta Opto, Inc.. Active years: 1990-2014.

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

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

USPTO Granted Patents = 62

% Patents Active = 91.9

Average Co-Inventor Count = 2.6

ph-index = 14

Forward Citations = 682(Granted Patents)

Forward Citations (Not Self Cited) = 674(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Osaka, JP (1990 - 1994)
  • Suita, JP (1994 - 1996)
  • Hirakata, JP (1993 - 1997)
  • Toyonaka, JP (1996 - 2014)

Company Filing History:

goldMedal38 out of 2,816 
 
Minolta Company, Ltd.
 patents
silverMedal15 out of 2,979 
 
Minolta Camera Kabushiki Kaisha
 patents
bronzeMedal8 out of 680 
 
Konica Minolta Opto, Inc.
 patents
4. 1 out of 1 
 
Minaltacco., Ltd.
 patent

Years Active: 1990-2014

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Areas of Expertise:
Projection Optical System
Image Projector
Illumination Optical System
Display Optical Apparatus
Zoom Lens System
Color Liquid Crystal Display
Camera Shake Compensation
Polarization Beam Splitter
Image Sensing Apparatus
Optical System
Image Blur Compensation
Projection Display Apparatus
62 patents (USPTO):Explore Patents
1. 8696133 - Projection optical system and image projecting device (2014-04-15),
2. 8425044 - Projection optical system (2013-04-23),
3. 8113667 - Projection optical system (2012-02-14),
4. 7862180 - Optical system for image projection and image projection apparatus (2011-01-04),
5. 7854515 - Projection type image display apparatus (2010-12-21),
6. 7524068 - Projection optical system (2009-04-28),
7. 7286290 - Optical illumination apparatus (2007-10-23),
8. 7075615 - Light separation device, blazed grating device, diffraction grating device, and illumination optical system (2006-07-11),
9. 7012758 - Projection optical system and projecting apparatus provided with same (2006-03-14),
10. 6880937 - Projection optical system and image projection apparatus (2005-04-19),
11. 6791750 - Polarization beam splitter (2004-09-14),
12. 6789902 - Projection optical system and projector using the same (2004-09-14),
13. 6741760 - Image sensing apparatus which intentionally retains longitudinal chromatic aberration (2004-05-25),
14. 6624952 - Projection optical system (2003-09-23),
15. 6624862 - Display optical apparatus having a rotary compensator to improve display contrast (2003-09-23),

As an AI assistant specializing in innovations, inventions, inventors, patent attorneys, assignees and patents, I would like to present to you an article about the accomplished inventor Kohtaro Hayashi from Toyonaka, Japan.

Title: The Innovative Journey of Kohtaro Hayashi

Introduction: Kohtaro Hayashi is a prolific inventor based in Toyonaka, JP, known for his outstanding contributions in the field of projection optical systems and image projecting devices. With an impressive portfolio of 62 patents, Kohtaro Hayashi has been at the forefront of cutting-edge technology.

Latest Patents: Among his recent patents is a groundbreaking Projection Optical System and Image Projecting Device. This system incorporates a relay optical system, a PBS prism, and two projection lenses to deliver three-dimensionally viewable and high-resolution projected images. By controlling the polarized states of light beams, Kohtaro Hayashi has revolutionized the world of projection technology.

Career Highlights: Kohtaro Hayashi is affiliated with Minolta Company, Ltd., a renowned company in the field of imaging and optical technology. His expertise and innovative approach have significantly contributed to the success of Minolta Company, Ltd. in delivering state-of-the-art products to the market.

Collaborations: Throughout his career, Kohtaro Hayashi has collaborated closely with esteemed colleagues such as Kenji Konno and Hiromu Mukai. Together, they have pushed the boundaries of innovation and set new standards in the industry.

Conclusion: In conclusion, Kohtaro Hayashi's inventive spirit and dedication to technological advancement have solidified his reputation as a trailblazer in the field of projection optical systems. His work continues to inspire and shape the future of optical technology.

If you require more information or have any specific requests, feel free to ask.

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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