logo

For the Inventor, By the Inventor

Tokyo, Japan

Kenji Yamada

This inventor holds 88 USPTO granted patents and 12 published patent applications and 19 EPO patents, primarily in Semiconductor Manufacturing (CPC class C11D11-0047). Top assignees: Ricoh Company, Ltd., Mitsubishi Gas Chemical Company, Inc., Nec Corporation. Active years: 1988-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenji Yamada. Retrieved from https://idiyas.com/inventor/kenji-yamada-ydj6k89k

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

Calculating rank
USPTO Granted Patents = 88 

% Patents Active = 76.1

 

Average Co-Inventor Count = 2.7

ph-index = 25

Forward Citations = 2,837(Granted Patents)

Forward Citations (Not Self Cited) = 2,597(Dec 10, 2025)


Inventors with similar research interests:


    Location History:

    • Chiba, JP (1992 - 1996)
    • Yachiyo, JP (1991 - 2014)
    • Tokyo, JP (1988 - 2022)
    • Katsushika-ku, JP (2022 - 2023)

    Company Filing History:

    goldMedal41 out of 28,957 
     
    Ricoh Company, Ltd.
     patents
    silverMedal12 out of 2,304 
     
    Mitsubishi Gas Chemical Company, Inc.
     patents
    bronzeMedal7 out of 36,735 
     
    Nec Corporation
     patents
    4. 7 out of 8,998 
     
    Nikon Corporation
     patents
    5. 7 out of 90 
     
    Nikon Vision Co., Ltd.
     patents
    6. 5 out of 58,148 
     
    Sony Corporation
     patents
    7. 3 out of 231 
     
    Ishikawa Gasket Co., Ltd.
     patents
    8. 1 out of 1,161 
     
    Agc Inc.
     patents
    9. 1 out of 46 
     
    Asahi Kasei Microsystems Co., Ltd.
     patents
    10. 1 out of 412 
     
    Dai Nippon Insatsu Kabushiki Kaisha
     patents
    11. 1 out of 1,306 
     
    Dainippon Screen Mfg. Co., Ltd.
     patents
    12. 1 out of 3,724 
     
    Nippon Steel Corporation
     patents
    13. 1 out of 1,102 
     
    Nippon Steel Sumitomo Metal Corporation
     patents
    14. 1 out of 5,300 
     
    Nippon Telegraph and Telephone Corporation
     patents
    15. 1 out of 164 
     
    Ntt Electronics Corporation
     patents
    16. 1 out of 4,980 
     
    Oki Electric Industry Co., Ltd.
     patents
    17. 1 out of 314 
     
    Taisho Pharmaceutical Co., Ltd.
     patents
    18. 2 out of 834,601 
    Other
     patents
    where one patent can have more than one assignee

    Years Active: 1988-2025

    Loading Chart...
    Loading Chart...
    Areas of Expertise:
    SiC Composite Component
    Thin Steel Sheet
    Aqueous Composition
    Semiconductor Substrate
    Wireless Transmission
    Metal Strip Control
    Transistor Production
    Image Forming Apparatus
    Sheet Finisher
    Copper Wiring Protection
    In-Vehicle Apparatus
    Zoom Eyepiece Lens
    88 patents (USPTO):Explore Patents
    1. 12415762 - Method of producing SiC—Si composite component and SiC—Si composite component (2025-09-16),
    2. 12221664 - Apparatus for manufacturing thin steel sheet and method for manufacturing thin steel sheet (2025-02-11),
    3. 11629315 - Aqueous composition and cleaning method using same (2023-04-18),
    4. 11613720 - Aqueous composition and cleaning method using same (2023-03-28),
    5. 11479744 - Composition having suppressed alumina damage and production method for semiconductor substrate using same (2022-10-25),
    6. 11352593 - Aqueous composition and cleaning method using same (2022-06-07),
    7. 11228397 - Wireless transmission system, wireless transmission device, wireless transmission method, and wireless transmission program (2022-01-18),
    8. 10791179 - Remote management system for specifying a protocol to be used between an intermediary device and a device in a remote system (2020-09-29),
    9. 10307806 - Rolling control method for metal strip, rolling control apparatus, and manufacturing method for rolled metal strip (2019-06-04),
    10. 10028049 - Headphones (2018-07-17),
    11. 9334161 - Processing liquid for suppressing pattern collapse of fine metal structure and method for producing fine metal structure using same (2016-05-10),
    12. 9262114 - Information apparatus and information processing system (2016-02-16),
    13. 9196472 - Processing liquid for suppressing pattern collapse of fine metal structure, and method for producing fine metal structure using same (2015-11-24),
    14. 8859411 - Method for producing transistor (2014-10-14),
    15. 8802608 - Composition for cleaning and rust prevention and process for producing semiconductor element or display element (2014-08-12),

    Title: Kenji Yamada: Tokyo's Prolific Innovator with 86 Patents

    Introduction:

    Meet Kenji Yamada, a Tokyo-based innovator with a remarkable track record of 86 patents to his name. With a keen eye for developing cleansing methods and compositions, Yamada has made significant contributions in the field of aqueous compositions and cleaning techniques. Let's take a closer look at his latest patents, career highlights, and notable collaborations.

    Latest Patents:

    Yamada's most recent patents revolve around the development of novel aqueous compositions and cleaning methods. One of his notable inventions is an aqueous composition formulated with various compounds, such as Calkylphosphonic acid, Calkylphosphonate ester, Calkyl phosphate, and their salts. This composition aims to enhance the cleaning efficiency in various applications. Additionally, Yamada has also patented an aqueous composition incorporating fluorine-containing compounds, including tetrafluoroboric acid, hexafluorosilicic acid, hexafluoroaluminic acid, hexafluorotitanic acid, and their salts. This innovative composition offers improved cleaning capabilities in different industries.

    Career Highlights:

    Yamada has amassed an impressive number of patents throughout his career, showcasing his expertise and passion for innovation. His contributions have been widely recognized and appreciated in the field of cleansing methods and aqueous compositions. Yamada's dedication and commitment to pushing the boundaries of cleaning technologies have solidified his reputation as a prominent inventor in Tokyo, Japan.

    Collaborations:

    Throughout his journey, Yamada has had the privilege of working with renowned companies in the industry, further augmenting his knowledge and expertise. Noteworthy collaborations include his tenure in Ricoh Company, Ltd., a prominent multinational imaging and electronics company. Yamada's affiliation with Mitsubishi Gas Chemical Company, Inc. has also been instrumental in his innovative pursuits. These collaborations have provided Yamada with valuable opportunities to explore new ideas and refine his inventions.

    Conclusion:

    Kenji Yamada, based in Tokyo, has established himself as an influential innovator with 86 patents under his name. His recent patents have focused on developing aqueous compositions and cleaning methods, offering more efficient solutions in various industries. Yamada's career highlights and collaborations with renowned companies like Ricoh and Mitsubishi Gas Chemical attest to his dedication and expertise. As an integral part of Tokyo's innovation landscape, Yamada's contributions continue to inspire the future of cleaning technologies and aqueous compositions.

    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…