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For the Inventor, By the Inventor

Yokohama, Japan

Yasuyuki Tamura

This inventor holds 113 USPTO granted patents and 3 EPO patents, primarily in Inkjet Technology (CPC class 400120). Top assignees: Canon Kabushiki Kaisha, Fujitsu Corporation, Other. Active years: 1979-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuyuki Tamura. Retrieved from https://idiyas.com/inventor/yasuyuki-tamura

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

USPTO Granted Patents = 113

% Patents Active = 88.5

 

Average Co-Inventor Count = 2.3

ph-index = 18

Forward Citations = 1,045(Granted Patents)

Forward Citations (Not Self Cited) = 1,007(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • JP (1983)
  • Ohta-ku, Tokyo, JP (1990)
  • Kanagawa, JP (2004 - 2008)
  • Ibaraki, JP (2006 - 2009)
  • Kawasaki, JP (1979 - 2010)
  • Yokohama, JP (1988 - 2020)

Company Filing History:

goldMedal107 out of 93,085 
 
Canon Kabushiki Kaisha
 patents
silverMedal5 out of 39,378 
 
Fujitsu Corporation
 patents
bronzeMedal1 out of 834,570 
Other
 patents

Years Active: 1979-2020

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Areas of Expertise:
Liquid Ejection
Imprint Methods
Inkjet Technology
Semiconductor Fabrication
Ejection Orifice
Recording Apparatus
Inkjet Head Unit
Exposure Apparatus
Liquid Discharge
Driving Method
Control Method
Print Medium
113 patents (USPTO):Explore Patents
1. 10661578 - Printing apparatus and concentration correction method (2020-05-26),
2. 10618303 - Liquid ejection apparatus (2020-04-14),
3. 10406743 - Imprint apparatus, imprint method, and method of manufacturing article (2019-09-10),
4. 9919521 - Liquid ejection head (2018-03-20),
5. 9895882 - Driving device for a liquid ejection head (2018-02-20),
6. 9751317 - Liquid ejection device (2017-09-05),
7. 9688069 - Liquid discharge apparatus and liquid discharge head (2017-06-27),
8. 9636851 - Imprint apparatus and article manufacturing method (2017-05-02),
9. 9623654 - Liquid ejecting control method and liquid ejecting apparatus (2017-04-18),
10. 9539810 - Liquid discharge head and head unit using the same (2017-01-10),
11. 9493004 - Liquid discharge apparatus and method for controlling the same (2016-11-15),
12. 9475303 - Liquid ejection device and liquid leakage suppression method (2016-10-25),
13. 9340032 - Liquid ejection device and liquid leakage suppression method (2016-05-17),
14. 9254659 - Liquid ejection apparatus and liquid ejection head (2016-02-09),
15. 9227406 - Method of manufacturing an ejection orifice member (2016-01-05),

Title: **Yasuyuki Tamura: Innovator in Printing Technology**

Introduction

Yasuyuki Tamura is a prominent inventor based in Yokohama, Japan, known for his significant contributions to printing technology. With an impressive total of 112 patents to his name, Tamura's work has been instrumental in advancing the efficiency and performance of printing apparatuses.

Latest Patents

Among his latest innovations are two noteworthy patents: the **Printing Apparatus and Concentration Correction Method** and the **Liquid Ejection Apparatus**. The Printing Apparatus includes a sophisticated circulation route designed to supply ink from a storage unit to a print head while returning collected ink. This system features a first detection unit to monitor ink concentration and an injection unit that introduces a correcting liquid to maintain optimal ink levels. Similarly, the Liquid Ejection Apparatus is engineered to circulate ink between an ink tank and an ejection head, effectively preventing degradation of ejection performance through a compact and cost-effective design.

Career Highlights

Throughout his career, Yasuyuki Tamura has held positions at leading technology companies, including Canon Inc. and Fujitsu Corporation. His roles at these firms have allowed him to spearhead innovative projects that solidify his reputation as a key contributor in the field of printing technology.

Collaborations

Tamura has collaborated with notable professionals such as Masayoshi Tachihara and Makoto Shioya, enhancing his expertise and contributing to his successful patent portfolio. These collaborations have fostered an environment of innovation that continues to influence developments in the industry.

Conclusion

Yasuyuki Tamura's extensive patent portfolio and collaborations highlight his role as a leading inventor in the field of printing technology. His innovative approaches to printing and liquid ejection systems promise to shape the future of the industry, showcasing his dedication to advancing 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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