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For the Inventor, By the Inventor

Kanagawa, Japan

Yoshiro Yamashita

This inventor holds 55 USPTO granted patents and 3 published patent applications, primarily in Ink Jet Recording (CPC class 106 ). Top assignees: Fuji Xerox Co., Ltd., Fujifilm Business Innovation Corp., Mitsubishi Oil Co., Ltd.. Active years: 1990-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiro Yamashita. Retrieved from https://idiyas.com/inventor/yoshiro-yamashita

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

USPTO Granted Patents = 55 

% Patents Active = 61.8

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 569(Granted Patents)

Forward Citations (Not Self Cited) = 563(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Aichi, JP (1990 - 1991)
  • Miyagi, JP (1990 - 1992)
  • Minami-ashigari, JP (1995)
  • Manami Ashigara, JP (1999)
  • Ebina, JP (2006 - 2008)
  • Minami-ashigara, JP (1994 - 2019)
  • Kanagawa, JP (2001 - 2024)

Company Filing History:

goldMedal48 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents
silverMedal5 out of 2,407 
 
Fujifilm Business Innovation Corp.
 patents
bronzeMedal2 out of 54 
 
Mitsubishi Oil Co., Ltd.
 patents
4. 2 out of 2 
 
Toshio Mukai
 patents
5. 1 out of 1 
 
Tsutomu Miyashi
 patent
6. 4 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1990-2025

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Areas of Expertise:
Ink Jet Recording
Image Forming Apparatus
Cleaning Device
Aqueous Ink
Recording Method
Transfer Device
Ink Cartridge
Recording Material
Ultraviolet-Curable Ink
Composition for Image Recording
Heat Inkjet Recording
Ink Ejecting Apparatus
55 patents (USPTO):Explore Patents
1. 12498655 - Film, member, transfer device, and image forming apparatus (2025-12-16),
2. 12135520 - Belt cleaning blade, photoreceptor cleaning blade, image forming apparatus, transfer device, and cleaning device (2024-11-05),
3. 12124204 - Cleaning blade, cleaning device, process cartridge, and image forming apparatus (2024-10-22),
4. 11966175 - Intermediate transfer belt cleaning system, transfer device, and image forming apparatus (2024-04-23),
5. 11960231 - Transfer device and image forming apparatus (2024-04-16),
6. 10494535 - Near-infrared absorbent dispersion, aqueous ink for ink jet recording, and aqueous ink set for ink jet recording (2019-12-03),
7. 10407585 - Aqueous ink for ink jet recording, aqueous ink set for ink jet recording, and ink jet recording method (2019-09-10),
8. 10343421 - Aqueous ink for ink jet recording, aqueous ink set for ink jet recording, and ink jet recording apparatus (2019-07-09),
9. 9752043 - Coating liquid and recording medium (2017-09-05),
10. 9498976 - Ultraviolet-curable aqueous ink, ink cartridge, recording apparatus and recording method (2016-11-22),
11. 9056999 - Ultraviolet-curable aqueous ink, ink cartridge, recording apparatus and recording method (2015-06-16),
12. 8967781 - Image recording composition, image recording ink set and recording apparatus (2015-03-03),
13. 8567915 - Inkjet recording method by heat, inkjet recording apparatus using heat, and ink for inkjet recording by heat (2013-10-29),
14. 8546466 - Image recording composition, ink set for image recording, recording apparatus, and image recording method (2013-10-01),
15. 8459762 - Recording apparatus and recording method (2013-06-11),

Title: Yoshiro Yamashita: Innovative Mind from Kanagawa

Introduction

Yoshiro Yamashita, an accomplished inventor based in Kanagawa, Japan, holds an impressive portfolio of 54 patents. His contributions to the field of cleaning apparatus and related technologies have established him as a pivotal figure in the innovation landscape.

Latest Patents

Among his latest inventions are a belt cleaning blade, a photoreceptor cleaning blade, an image forming apparatus, a transfer device, and a cleaning device. The belt cleaning blade features a contact site crafted from polyurethane rubber that includes both hard and soft segments. In the cross-section of this contact site, the ratio X of hard segment domains to the total area maintains between 14.9% and 25.1%. Additionally, the ratio Y, indicating the area of hard segment domains sized between 200 nm and 1,000 nm, spans from 17.8% to 46.5%. These precision-based parameters showcase his dedication to enhancing cleaning efficiency in various applications.

Further, the cleaning blade incorporates a contact portion made of a cured substance derived from a polyisocyanate and a polyol, designed to optimize interaction with the components needing cleaning. This innovative approach underlines Yamashita's commitment to refining and advancing cleaning system technologies.

Career Highlights

Yamashita’s career has been marked by significant milestones, particularly through his association with Fuji Xerox Co., Ltd., where he has contributed to numerous innovations in cleaning technologies. His extensive knowledge and expertise have solidified his reputation in the industry, making substantial impacts on operational efficiencies.

Collaborations

Collaboration has been a key element in Yamashita's journey. He has worked alongside notable colleagues such as Ken Hashimoto and Toshitake Yui. These partnerships have spurred further advancements and innovations in the cleaning technology sphere.

Conclusion

In summary, Yoshiro Yamashita's inventive spirit and his contributions through his patents reflect a deep understanding of both materials science and engineering. His work is not only vital to the companies he has been associated with but also to the broader tech landscape in Japan and beyond. As he continues to innovate, the potential for future breakthroughs remains promising.

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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