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For the Inventor, By the Inventor

Kanagawa, Japan

Yutaka Koizumi

This inventor holds 118 USPTO granted patents, primarily in Ink Jet Technology (CPC class 346140R). Top assignees: Canon Kabushiki Kaisha, Ricoh Company, Ltd., Yokogawa Electric Corporation. Active years: 1976-2014.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yutaka Koizumi. Retrieved from https://idiyas.com/inventor/yutaka-koizumi

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

USPTO Granted Patents = 118

% Patents Active = 89.0

Average Co-Inventor Count = 3.3

ph-index = 25

Forward Citations = 1,946(Granted Patents)

Forward Citations (Not Self Cited) = 1,863(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Tokyo, J (1976)
  • Tokyo, JA (1977)
  • Kawasaki, JP (1979 - 1988)
  • Hiratsuka, JP (1985 - 1999)
  • Tokyo, JP (1978 - 2003)
  • Kanagawa-ken, JP (2005)
  • Kanagawa, JP (1984 - 2006)
  • Yokohama, JP (1988 - 2014)

Company Filing History:

goldMedal82 out of 92,994 
 
Canon Kabushiki Kaisha
 patents
silverMedal28 out of 28,940 
 
Ricoh Company, Ltd.
 patents
bronzeMedal3 out of 1,413 
 
Yokogawa Electric Corporation
 patents
4. 2 out of 36,684 
 
Nec Corporation
 patents
5. 1 out of 28 
 
Canon Aptex
 patents
6. 1 out of 1,038 
 
Nippon Electric Co., Ltd.
 patents
7. 1 out of 2 
 
Ricon Company, Ltd.
 patents
8. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1976-2014

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Areas of Expertise:
Ink Jet Recording Head
Liquid Discharge Apparatus
Liquid Ejection
Ink Tank
Flexible Film Wiring
Printing Method
Cartridge Design
Sealing Member
Manufacturing Method
Pressure Adjustment Chamber
Liquid Supply System
Laser Processing
118 patents (USPTO):Explore Patents
1. 8783824 - Capping unit for ink jet recording unit (2014-07-22),
2. 8511808 - Liquid-ejecting recording head and liquid-ejecting recording apparatus (2013-08-20),
3. 8152267 - Ink jet recording apparatus (2012-04-10),
4. 7784908 - Flexible film wiring board and liquid discharge head (2010-08-31),
5. D548780 - Ink tank for printer (2007-08-14),
6. D542345 - Ink tank for printer (2007-05-08),
7. 7070267 - Liquid jet recording head and liquid jet recording apparatus (2006-07-04),
8. 7044588 - Ink jet head storing structure and liquid filling method (2006-05-16),
9. 6975466 - Liquid discharge recording head, liquid discharge recording apparatus, and method for manufacturing liquid discharge head (2005-12-13),
10. 6957883 - Liquid discharge recording head (2005-10-25),
11. 6945643 - Ink jet head storing structure and liquid filling method (2005-09-20),
12. 6913351 - Liquid jet recording head and recording apparatus (2005-07-05),
13. 6880925 - Liquid discharge recording head, liquid discharge recording apparatus, and method for producing stopper member for liquid discharge recording head (2005-04-19),
14. RE38710 - Laser process for making a filter for an ink jet (2005-03-14),
15. 6851795 - Cartridge with opposed electrical and ink connection portions, and carriage and ink jet recording apparatus for same (2005-02-08),

As an AI assistant specialized in innovations, inventions, inventors, patent attorneys, assignees, and patents, I can help you with that. Let's proceed with the article.

Title: The Innovation Journey of Yutaka Koizumi

Introduction:

Yutaka Koizumi, a prolific inventor based in Kanagawa, Japan, has made significant contributions to the field of ink jet printing technology with a remarkable portfolio of 117 patents.

Latest Patents:

Among his latest patents is the "Capping unit for ink jet recording unit," showcasing his expertise in designing detachable capping units for ink jet recording heads. This innovation features a liquid-absorbing member and a capping member to ensure optimal performance and maintenance of ink jet printers. Another notable patent is the "Liquid-ejecting recording head and liquid-ejecting recording apparatus," highlighting his mastery in improving the functionality and efficiency of recording heads.

Career Highlights:

Yutaka Koizumi has made waves in renowned companies such as Canon Inc. and Ricoh Company, Ltd., where his inventive spirit and technical prowess have been instrumental in driving technological advancements in the printing industry.

Collaborations:

Throughout his career, Yutaka Koizumi has collaborated with esteemed colleagues such as Hiroki Tajima and Kouichi Omata, fostering a culture of innovation and collective problem-solving to push the boundaries of ink jet technology.

Conclusion:

In conclusion, Yutaka Koizumi stands as a visionary inventor whose relentless pursuit of excellence has revolutionized the field of ink jet printing. His groundbreaking patents and collaborative efforts reflect a legacy of innovation that continues to inspire future generations in the realm of printing technology.

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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