Tokyo, Japan

Kiyoshi Negishi

This inventor holds 58 USPTO granted patents, primarily in Thermal Printing Technology (CPC class 3552). Top assignees: Asahi Kogaku Kogyo Kabushiki Kaisha, Hoya Corporation, Asahi Kogaku Kogyo K.k.. Active years: 1980-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyoshi Negishi. Retrieved from https://idiyas.com/inventor/kiyoshi-negishi

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


% Patents Active = 91.4

Average Co-Inventor Count = 2.1

ph-index = 16

Forward Citations = 759(Granted Patents)

Forward Citations (Not Self Cited) = 697(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Asaka, JP (1980)
  • Tsurugashima, JP (1990 - 1995)
  • Tsurugashima-machi, JP (1996 - 1997)
  • Saitama-ken, JP (2009)
  • Tokyo, JP (1985 - 2010)
  • Saitama, JP (1988 - 2012)

Company Filing History:


Years Active: 1980-2012

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Areas of Expertise:
Endoscope Light Source
Thermal Printer
Electrophotographic Printer
Battery Life Optimization
Power Control
Image Processing
Printer Diagnostics
Continuous Form Printing
Temperature Control
Data Recovery
Mode Control
Optical Printer
58 patents (USPTO):Explore Patents

Title: The Innovations of Kiyoshi Negishi: A Pioneer in Endoscope Technology

Introduction: Kiyoshi Negishi, an esteemed inventor based in Tokyo, Japan, has made significant contributions to the field of medical technology. With an impressive portfolio of 58 patents, Negishi has focused particularly on innovations that enhance the functionality and efficiency of endoscopes.

Latest Patents: Among his recent patents is an advanced endoscope light source unit designed to optimize illumination during medical procedures. This invention boasts a rotary aperture plate that features aperture openings of varying ratios, along with an auxiliary-light aperture opening that maximizes light output. Incorporating a complex system of sensors and a controller, the unit efficiently manages the flow of light based on sensory input. Another notable patent from Negishi addresses an endoscope light source unit that includes a sophisticated aperture device and a range of detection and measurement systems. This enables precise control over the positioning of light for improved visibility and operational effectiveness.

Career Highlights: Negishi's career spans several years in the industry, during which he has held pivotal positions in prominent companies. He has worked at Asahi Kogaku Kogyo Kabushiki Kaisha, where he contributed to the development of optical technologies, and Hoya Corporation, a leading manufacturer of optical products. His innovations have not only enhanced the performance of medical instruments but have also paved the way for future advancements in the field.

Collaborations: Throughout his career, Kiyoshi Negishi has collaborated with notable professionals including Masahiro Kita and Ikuo Negoro. These partnerships have fostered a creative environment that has led to groundbreaking inventions aimed at improving medical procedures and patient outcomes.

Conclusion: Kiyoshi Negishi's work exemplifies the spirit of innovation in medical technology. His dedication to enhancing the functionality of endoscopes through inventive design and engineering has had a lasting impact on the field. As he continues to develop new technologies, his contributions are expected to play a crucial role in advancing medical practices worldwide.

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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