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For the Inventor, By the Inventor

Tokyo, Japan

Tetsu Koyama

This inventor holds 32 USPTO granted patents and 5 EPO patents, primarily in Image Formation Technology. Top assignees: Oki Data Corporation, Nec Corporation, Oki Electric Industry Co., Ltd.. Active years: 1987-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsu Koyama. Retrieved from https://idiyas.com/inventor/tetsu-koyama

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

Calculating rank
USPTO Granted Patents = 32

% Patents Active = 78.1

 

Average Co-Inventor Count = 1.8

ph-index = 8

Forward Citations = 235(Granted Patents)


Company Filing History:

goldMedal23 out of 1,875 
 
Oki Data Corporation
 patents
silverMedal5 out of 36,735 
 
Nec Corporation
 patents
bronzeMedal4 out of 4,980 
 
Oki Electric Industry Co., Ltd.
 patents

Years Active: 1987-2024

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Areas of Expertise:
Toner Cartridge
Image Drum Cartridge
Image Forming Unit
Developing Device
Developer Container
Image Formation Apparatus
Toner Container
Echo Canceller
Digital Data Transmission
Subscriber Cables
FSK Modulation
32 patents (USPTO):Explore Patents
1. D1009988 - Toner cartridge (2024-01-02),
2. D998033 - Image drum cartridge (2023-09-05),
3. D984529 - Image drum cartridge (2023-04-25),
4. D967891 - Toner cartridge (2022-10-25),
5. 10606208 - Developer container, image formation unit, and image formation apparatus (2020-03-31),
6. 10466619 - Replaceable unit, developing unit, image forming unit, and image forming apparatus (2019-11-05),
7. 10274866 - Toner container, image forming unit including the toner container, and image forming apparatus including the toner container (2019-04-30),
8. 9448530 - Developer storage body, image forming unit and image forming apparatus (2016-09-20),
9. 9223249 - Image forming unit and image forming apparatus (2015-12-29),
10. 9217952 - Image forming unit and image forming apparatus (2015-12-22),
11. 9152125 - Image forming unit and image forming apparatus that incorporates the image forming unit (2015-10-06),
12. 8983342 - Developer storage container, image forming unit and image forming apparatus (2015-03-17),
13. 8712294 - Image forming unit having agitating portion and image forming apparatus (2014-04-29),
14. 7957682 - Image forming unit and image forming apparatus (2011-06-07),
15. 7917059 - Developing device and image forming apparatus (2011-03-29),

Title: Tetsu Koyama: Pioneering Inventor from Tokyo

Introduction:

Tetsu Koyama, a distinguished inventor hailing from Tokyo, Japan, has made significant contributions to the field of technology with an impressive total of 32 patents under his name. His innovative spirit and dedication to advancement have positioned him as a key figure in the realm of inventors.

Latest Patents:

Among his latest patents are revolutionary creations such as the Toner Cartridge and Image Drum Cartridge, which showcase his expertise in developing practical solutions that cater to the needs of the digital age.

Career Highlights:

Throughout his career, Tetsu Koyama has been associated with renowned technology companies such as Oki Data Corporation and NEC Corporation. His tenure at these establishments has provided him with invaluable experience and a platform to bring his groundbreaking ideas to life.

Collaborations:

Tetsu Koyama has collaborated with esteemed professionals in the industry, including Shinichi Otani and Hisatoshi Saito. Together, they have combined their unique skills and knowledge to drive innovation forward and shape the future of technology.

Conclusion:

In conclusion, Tetsu Koyama stands as a testament to the power of innovation and perseverance in the world of inventors. His impressive patent portfolio and collaborations underscore his dedication to pushing the boundaries of technological advancement, making him a revered figure in the realm of invention and creativity.

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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