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For the Inventor, By the Inventor

Yokohama, Japan

Nobuhiko Umezawa

This inventor holds 13 USPTO granted patents and 1 EPO patent. Top assignee: Ricoh Company, Ltd.. Active years: 1994-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuhiko Umezawa. Retrieved from https://idiyas.com/inventor/nobuhiko-umezawa

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

USPTO Granted Patents = 13

% Patents Active = 76.9


Average Co-Inventor Count = 3.0

ph-index = 7

Forward Citations = 153(Granted Patents)


Location History:

  • Gyouda, JP (1994)
  • Kanagawa-Ken, JP (2004)
  • Yokohama, JP (1998 - 2007)
  • Kanagawa, JP (1999 - 2008)

Company Filing History:

goldMedal13 out of 28,951 
 
Ricoh Company, Ltd.
 patents

Years Active: 1994-2008

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13 patents (USPTO):Explore Patents
1. D574426 - Toner cartridge (2008-08-05),
2. D568928 - Toner cartridge (2008-05-13),
3. D554695 - Toner cartridge (2007-11-06),
4. 7254357 - Method and apparatus for image forming capable of effectively regulating a toner layer, developing mechanism for the apparatus, and a process cartridge provided in the apparatus (2007-08-07),
5. 7177573 - Image forming apparatus with reversely rotated developer bearing members (2007-02-13),
6. 6795674 - Developing device for an image forming apparatus (2004-09-21),
7. 6775506 - Method and apparatus for image developing capable of effectively forming an even development agent layer (2004-08-10),
8. 6643486 - Developing device for an image forming apparatus (2003-11-04),
9. 6295438 - Method and apparatus for forming an image capable of supplying a proper amount of a lubricant to each image forming section (2001-09-25),
10. 5953568 - Developing unit for an image forming apparatus having a magnetic (1999-09-14),
11. 5848329 - Image forming apparatus having a mounting/dismounting mechanism (1998-12-08),
12. 5797063 - Image forming apparatus and cleaning device for transfer material (1998-08-18),
13. 5374980 - Color image forming apparatus utilizing liquid development (1994-12-20),

Title: Nobuhiko Umezawa: Innovator in Toner Cartridge Technology

Introduction

Nobuhiko Umezawa is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of printing technology, particularly in the development of toner cartridges. With a total of 13 patents to his name, Umezawa has established himself as a key figure in innovation within the industry.

Latest Patents

One of Umezawa's latest patents focuses on the design and functionality of toner cartridges. This innovation aims to enhance the efficiency and performance of printing devices, making them more reliable for users.

Career Highlights

Umezawa is currently employed at Ricoh Company, Ltd., a leading organization in imaging and electronics. His work at Ricoh has allowed him to explore various aspects of printing technology, contributing to the company's reputation for quality and innovation.

Collaborations

Throughout his career, Umezawa has collaborated with notable colleagues, including Shuuichi Endoh and Osamu Endou. These partnerships have fostered a creative environment that encourages the exchange of ideas and advancements in technology.

Conclusion

Nobuhiko Umezawa's contributions to toner cartridge technology exemplify his dedication to innovation. His work continues to influence the printing industry, ensuring that users benefit from improved products and solutions.

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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