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For the Inventor, By the Inventor

Kanagawa, Japan

Tsutomu Onuma

This inventor holds 23 USPTO granted patents and 3 EPO patents, primarily in Toner Production. Top assignee: Canon Kabushiki Kaisha. Active years: 1994-2010.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsutomu Onuma. Retrieved from https://idiyas.com/inventor/tsutomu-onuma

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

Calculating rank
USPTO Granted Patents = 23

% Patents Active = 91.3


Average Co-Inventor Count = 5.2

ph-index = 12

Forward Citations = 414(Granted Patents)


Location History:

  • Kawasaki, JP (1994 - 1995)
  • Kanagawa, JP (2004 - 2008)
  • Yokohama, JP (1997 - 2010)

Company Filing History:

goldMedal23 out of 93,258 
 
Canon Kabushiki Kaisha
 patents

Years Active: 1994-2010

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Areas of Expertise:
Toner Production
Electrostatic Image
Process Cartridge
Magnetic Toner
Image Forming Method
Heat Fixing Method
Toner Regulating Blade
Azo Iron Compound
Hydrocarbon Wax
Positive-Chargeable Toner
Dry Toner
Toner Developer
23 patents (USPTO):Explore Patents
1. 7745089 - Process for producing toner, and toner (2010-06-29),
2. 7457572 - Image forming method and process cartridge using specific toner regulating blade and toner (2008-11-25),
3. 7351509 - Toner (2008-04-01),
4. 7306889 - Process for producing toner, and toner (2007-12-11),
5. 7288354 - Toner (2007-10-30),
6. 7273686 - Toner (2007-09-25),
7. 6810217 - Process cartridge (2004-10-26),
8. 6673506 - Toner production process (2004-01-06),
9. 6630275 - Magnetic toner and process cartridge (2003-10-07),
10. 6589701 - Dry toner, image forming method and process cartridge (2003-07-08),
11. 6541174 - Method using toner and developer for developing electrostatic image (2003-04-01),
12. 6537716 - Toner for developing electrostatic images and heat fixing method (2003-03-25),
13. 6458499 - Toner having hydrocarbon wax with specific ester value and hydroxyl value (2002-10-01),
14. 6426169 - Toner containing azo iron compound (2002-07-30),
15. 6187496 - Toner and developer for developing electrostatic image, process for production thereof and image forming method (2001-02-13),

As an AI assistant specializing in innovations, inventions, inventors, patent attorneys, assignees, and patents, I can provide information on inventor Tsutomu Onuma from Kanagawa, JP. Here is the structured article based on the data provided:

Title: Unleashing Innovation: The Inventor Tsutomu Onuma

Introduction: Meet Tsutomu Onuma, a prolific inventor with 23 patents to his name and a knack for revolutionizing toner production processes.

Latest Patents: Tsutomu Onuma's latest patents include a groundbreaking process for producing toner. This process involves cross-linking reactions to create a toner composition with superior fixing performance, anti-offset properties, and durability, ensuring high-quality images in various environmental conditions.

Career Highlights: Tsutomu Onuma is affiliated with Canon Kabushiki Kaisha, a renowned company in the field. He has showcased exceptional expertise in developing innovative toner solutions that cater to diverse printing requirements.

Collaborations: Tsutomu Onuma has worked closely with esteemed colleagues such as Hirohide Tanikawa and Nobuyuki Okubo, demonstrating a collaborative spirit in advancing toner technology.

Conclusion: Tsutomu Onuma's contributions to the field of toner production are exemplary, reflecting his commitment to innovation and quality in every patent he has secured.

If you have any more requests related to innovations, inventions, inventors, patent attorneys, assignees, or patents, feel free to ask!

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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