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For the Inventor, By the Inventor

Kobe, Japan

Keitaro Yonezawa

This inventor holds 90 USPTO granted patents and 15 EPO patents, primarily in Clamping Devices (CPC class 269 24). Top assignees: Kabushiki Kaisha Kosmek, Kosmek Ltd., Kabushiki Kaisha Neriki. Active years: 1976-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keitaro Yonezawa. Retrieved from https://idiyas.com/inventor/keitaro-yonezawa

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

USPTO Granted Patents = 90

% Patents Active = 83.3

 

Average Co-Inventor Count = 1.4

ph-index = 13

Forward Citations = 627(Granted Patents)

Forward Citations (Not Self Cited) = 545(Dec 10, 2025)


Inventors with similar research interests:


    Location History:

    • Amagasakishi, JA (1977)
    • Kobe, JA (1976 - 1978)
    • Kobeshi, JP (1982)
    • Hyoken, JP (1989)
    • Hyogoken, JP (1990)
    • Amagasakishi, JP (1988 - 1991)
    • Amagasaki, JP (1989 - 1991)
    • Nishi, JP (1991)
    • Nadaku Kobe, JP (1991)
    • Hyogo, JP (2016 - 2021)
    • Kobe, JP (1980 - 2024)

    Company Filing History:

    goldMedal56 out of 75 
     
    Kabushiki Kaisha Kosmek
     patents
    silverMedal24 out of 71 
     
    Kosmek Ltd.
     patents
    bronzeMedal7 out of 18 
     
    Kabushiki Kaisha Neriki
     patents
    4. 2 out of 10 
     
    Aioi Seiki Kabushiki Kaisha
     patents
    5. 2 out of 166 
     
    Mori Seiki Co., Ltd.
     patents
    6. 1 out of 1 
     
    Kabushiki Kaisha Kosmek and Amada Company, Limited
     patent
    where one patent can have more than one assignee

    Years Active: 1976-2024

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    Areas of Expertise:
    Clamping Device
    Hydraulic Pump
    Pneumatic Cylinder
    Rotary Clamp
    Positioning Apparatus
    Force Multiplication
    Safety Valve
    Automatic Positioning
    Clamp Arm
    Fluid Pressure Actuator
    Cylinder Assembly
    Overload Protector
    90 patents (USPTO):Explore Patents
    1. 12066022 - Motor and hydraulic pump device including the motor (2024-08-20),
    2. 11994155 - Cylinder device (2024-05-28),
    3. 11572903 - Pneumatic cylinder device with holding valve (2023-02-07),
    4. 11207752 - LNK type clamp device (2021-12-28),
    5. 11141837 - Attachment/detachment structure for clamp arm of clamping device (2021-10-12),
    6. 11110560 - Rotary clamp (2021-09-07),
    7. 10024340 - Cylinder device with force multiplication mechanism (2018-07-17),
    8. 10018191 - Cylinder apparatus (2018-07-10),
    9. 9909600 - Cylinder apparatus (2018-03-06),
    10. 9833866 - Clamp device (2017-12-05),
    11. 9573232 - Actuator and clamp device using same (2017-02-21),
    12. 9458865 - Cylinder device with force multiplier (2016-10-04),
    13. 8366090 - Clamping device (2013-02-05),
    14. 8302947 - Clamping apparatus (2012-11-06),
    15. 7793924 - Positioning device and clamping system with the device (2010-09-14),

    Certainly! Here is the article about inventor Keitaro Yonezawa:

    Title: The Innovative Mind of Keitaro Yonezawa: Revolutionizing Pneumatic Cylinder Devices

    Introduction:

    Keitaro Yonezawa, a prolific inventor based in Kobe, Japan, has made a significant mark in the field of engineering with his groundbreaking innovations. With a total of 88 patents to his name, Yonezawa's inventive spirit continues to drive technological advancements in various industries.

    Latest Patents:

    One of Yonezawa's latest patents includes the development of a Pneumatic Cylinder Device with a Holding Valve. This device features an output member movable in a left-right direction, coupled with a unique lock chamber and holding valve mechanism, enhancing efficiency and precision in pneumatic systems. Another remarkable invention is the LNK Type Clamp Device, designed to provide secure clamping solutions with enhanced flexibility and ease of use.

    Career Highlights:

    Throughout his illustrious career, Keitaro Yonezawa has worked with esteemed companies such as Kabushiki Kaisha Kosmek and Kosmek Ltd. His contributions to these organizations have led to the successful implementation of innovative technologies in manufacturing processes, improving productivity and quality standards.

    Collaborations:

    Yonezawa's collaborative efforts with talented individuals like Yosuke Haruna and Tsutomu Shirakawa have resulted in the development of cutting-edge solutions that address industry challenges and meet evolving market demands. Together, they have exemplified the power of teamwork and creativity in driving impactful inventions.

    Conclusion:

    In conclusion, Keitaro Yonezawa's passion for innovation and dedication to advancing engineering principles have established him as a respected figure in the world of patent technology. His relentless pursuit of excellence continues to inspire future generations of inventors, shaping a better tomorrow through visionary creations.

    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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