logo

For the Inventor, By the Inventor

Osaka, Japan

Yoshiyuki Shimizu

This inventor holds 72 USPTO granted patents and 9 published patent applications, plus 5 CIPO patents, primarily in Image Forming Apparatus (CPC class G03G). Top assignees: Ricoh Company, Ltd., Matsushita Electric Industrial Co., Ltd., Panasonic Corporation. Active years: 1990-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiyuki Shimizu. Retrieved from https://idiyas.com/inventor/yoshiyuki-shimizu

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

USPTO Granted Patents = 72 

% Patents Active = 68.1


Average Co-Inventor Count = 5.3

ph-index = 11

Forward Citations = 361(Granted Patents)

Forward Citations (Not Self Cited) = 262(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Neyagawa, JP (1994 - 1997)
  • Hirakata, JP (2008)
  • Ohsaka, JP (2008 - 2009)
  • Oosaka, JP (2008 - 2009)
  • Ikeda, JP (2010)
  • Nishinomiya, JP (2011)
  • Hyogo, JP (2011 - 2015)
  • Ohta-ku, JP (2014 - 2015)
  • Kanagawa, JP (2014 - 2016)
  • Osaka, JP (1990 - 2022)

Company Filing History:

goldMedal62 out of 28,951 
 
Ricoh Company, Ltd.
 patents
silverMedal6 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents
bronzeMedal3 out of 16,454 
 
Panasonic Corporation
 patents
4. 1 out of 4 
 
Pioneer Digital Design and Manufacturing Corporation
 patents
5. 1 out of 1 
 
Sumita Optical Glass Co., Ltd.
 patent
6. 1 out of 57 
 
Sumita Optical Glass, Inc.
 patents
where one patent can have more than one assignee

Years Active: 1990-2022

Loading Chart...
Loading Chart...
Areas of Expertise:
Image Forming Apparatus
Developer Container
Powder Transport
Toner Cartridge
Development Device
Process Unit
Toner Agitating Unit
Process Cartridge
Signal Channel
Positioning Structure
Cleaning Device
Latent Image Carrier
72 patents (USPTO):Explore Patents
1. 11506994 - Toner cartridge including a protrusion protruding from a center of a conveyance drive gear (2022-11-22),
2. 11231663 - Toner cartridge including a protrusion protruding from a center of a conveyance drive gear (2022-01-25),
3. 10816914 - Developer container for image forming apparatus (2020-10-27),
4. 10558145 - Downsized developer container with higher degree of freedom (2020-02-11),
5. 10295933 - Developer container, developing device, process unit, and image forming apparatus (2019-05-21),
6. 10175607 - Developer container including a convex portion, a rotator, and a recess (2019-01-08),
7. 9696657 - Developer container, developing device, process unit, and image forming apparatus (2017-07-04),
8. 9658574 - Powder container, developing device, process unit, and image forming apparatus (2017-05-23),
9. 9307189 - Relay apparatus controlling signal channel selection (2016-04-05),
10. 9280130 - Developer container, developing device, process unit, and image forming apparatus (2016-03-08),
11. 9268300 - Process unit including a rotatable shaft along a driving force vector and image forming apparatus including the same (2016-02-23),
12. 9239565 - Powder container, developing unit, process unit, and image forming apparatus incorporating same (2016-01-19),
13. 9176419 - Developer container, developing device, process unit, and image forming apparatus (2015-11-03),
14. 9141028 - Image forming apparatus and developer container, developing device, process unit, and replaceable unit therefor (2015-09-22),
15. 9069284 - Image forming apparatus and powder transport unit (2015-06-30),

Title: The Innovative Journey of Yoshiyuki Shimizu

Introduction: Yoshiyuki Shimizu is a distinguished inventor hailing from Osaka, Japan, with an impressive portfolio of 72 patents. His contributions to the field of technology, particularly in the development of toner cartridges, signify his innovative spirit and dedication to enhancing product functionality.

Latest Patents: Among his most recent inventions is the innovative toner cartridge which features a protrusion protruding from the center of a conveyance drive gear. This design incorporates a convex portion and a conveyance drive gear, where the protrusion is specifically crafted to be inserted into a hole located at the rear side of the convex portion. This intricate design aims to improve the efficiency and effectiveness of toner cartridges, showcasing Shimizu's ingenuity in tackling engineering challenges.

Career Highlights: Throughout his career, Yoshiyuki Shimizu has made significant strides within renowned companies including Ricoh Company, Ltd. and Matsushita Electric Industrial Co., Ltd. His work at these institutions has not only advanced his personal growth but has also contributed to the broader scope of the tech industry, propelling innovations in printing technology.

Collaborations: Shimizu has collaborated with notable colleagues such as Tomohiro Kubota and Hirobumi Ooyoshi. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and accelerates the development of groundbreaking technologies.

Conclusion: In conclusion, Yoshiyuki Shimizu's extensive patent portfolio and his impactful career mark him as a key figure in the landscape of technological innovations. His latest patented designs continue to push the envelope in the industry, and his collaborative efforts exemplify the importance of teamwork in innovation. As the world of technology evolves, inventors like Shimizu remain at the forefront, driving progress and inspiring future generations.

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]
Loading…