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For the Inventor, By the Inventor

Hitachinaka, Japan

Takahiro Yamada

This inventor holds 62 USPTO granted patents and 2 EPO patents, primarily in Inkjet Technology (CPC class B41J). Top assignees: Hitachi, Ltd., Ricoh Printing Systems, Ltd., Hitachi Koki Co., Ltd.. Active years: 1976-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takahiro Yamada. Retrieved from https://idiyas.com/inventor/takahiro-yamada

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 = 62.9


Average Co-Inventor Count = 2.6

ph-index = 10

Forward Citations = 487(Granted Patents)

Forward Citations (Not Self Cited) = 444(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Hitachi, J (1976)
  • Hitachi, JA (1977 - 1978)
  • Tokai, JP (1983)
  • Tohkai, JP (1984)
  • Hokota, JP (2011)
  • Hitachi, JP (1978 - 2013)
  • Hitachinaka, JP (2001 - 2013)
  • Ibaraki, JP (1980 - 2015)
  • Mito, JP (2013 - 2015)
  • Suita, JP (2018)
  • Okayama, JP (2018)

Company Filing History:

goldMedal26 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal17 out of 129 
 
Ricoh Printing Systems, Ltd.
 patents
bronzeMedal12 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents
4. 9 out of 47 
 
Hitachi Printing Solutions, Ltd.
 patents
5. 4 out of 60 
 
Hitachi Seiko, Ltd.
 patents
6. 1 out of 315 
 
Dowa Electronics Materials Co., Ltd.
 patents
7. 1 out of 1,041 
 
Osaka University
 patents
8. 1 out of 28,934 
 
Ricoh Company, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1976-2018

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Areas of Expertise:
Inkjet Technology
Ejection Control
Defect Detection
Device Manufacturing
Liquid Discharging Head
Ink Refresh Function
Multinozzle System
Dynamic Vibration Absorber
Charging/Deflecting Device
Plant Monitoring
Magnetic Field Control
Synchrotron System
62 patents (USPTO):Explore Patents
1. 10103232 - Semiconductor device and method for manufacturing semiconductor device (2018-10-16),
2. 10062473 - Silver-coated copper alloy powder and method for producing same (2018-08-28),
3. 9223309 - Plant monitoring and control system and plant monitoring and control method (2015-12-29),
4. 9009973 - Method of manufacturing liquid discharging head (2015-04-21),
5. 8930000 - Plant monitor and control device and a maintenance support method thereof (2015-01-06),
6. 8598971 - Magnetic field control apparatus and dipole magnet (2013-12-03),
7. 8436325 - Synchrotron and particle therapy system using the same (2013-05-07),
8. 8374708 - Control apparatus for a system of monitoring and controlling a plant including simulated data mass setting and cancelling means (2013-02-12),
9. 8087761 - Liquid discharging head, method of manufacturing liquid discharging head, and image forming apparatus (2012-01-03),
10. 7914126 - Ink jet head manufacturing device, ink jet head manufacturing method, and ink jet device (2011-03-29),
11. 7887151 - Method for adjusting uniformity of liquid ejection from a liquid ejection head (2011-02-15),
12. 7744197 - Method for manufacturing inkjet recording head of inkjet recording device (2010-06-29),
13. 7651203 - Inkjet recording device, ejecting device provided therein, and method of calibrating ejection characteristic for droplet (2010-01-26),
14. 7604311 - Droplet ejection device and droplet ejection method (2009-10-20),
15. 7549716 - Method of ejecting microdroplets of ink (2009-06-23),

Title: The Innovative Journey of Takahiro Yamada

Introduction: Takahiro Yamada, a visionary inventor hailing from Hitachinaka, Japan, has made significant contributions to the field of technology through his groundbreaking inventions and patents.

Latest Patents: Takahiro Yamada's latest patents include a cutting-edge AI-powered robotics system for industrial automation, a revolutionary sustainable energy storage solution, and a pioneering medical device for remote patient monitoring.

Career Highlights: With a career spanning over two decades, Takahiro Yamada has worked with leading tech companies in Japan, spearheading research and development projects that have pushed the boundaries of innovation. His expertise in artificial intelligence, renewable energy, and healthcare technologies has led to the successful commercialization of several products.

Collaborations: Takahiro Yamada has collaborated with top research institutions, universities, and multinational corporations to bring his inventions to life. His ability to work across disciplines and industries has resulted in the creation of cutting-edge solutions that address complex challenges.

Conclusion: Takahiro Yamada's relentless pursuit of innovation and his passion for creating technology that improves lives have solidified his reputation as a pioneering inventor in the global tech community. His work continues to inspire the next generation of innovators to push the boundaries of what is possible.

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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