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For the Inventor, By the Inventor

Kashiba, Japan

Yoshiaki Hamasaki

This inventor holds 13 USPTO granted patents and 1 EPO patent. Top assignees: Koyo Seiko Company, Ltd., Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Koyo Seiko Kabushiki Kaisha. Active years: 1989-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiaki Hamasaki. Retrieved from https://idiyas.com/inventor/yoshiaki-hamasaki

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

USPTO Granted Patents = 13

% Patents Active = 92.3

 

Average Co-Inventor Count = 3.5

ph-index = 7

Forward Citations = 104(Granted Patents)


Location History:

  • Osaka, JP (1989 - 1991)
  • Minamiku, JP (1991)
  • Nara, JP (1994)
  • Kashiba, JP (1993 - 2013)

Company Filing History:

goldMedal10 out of 772 
 
Koyo Seiko Company, Ltd.
 patents
silverMedal3 out of 1,649 
 
Mitsubishi Jidosha Kogyo Kabushiki Kaisha
 patents
bronzeMedal2 out of 15 
 
Koyo Seiko Kabushiki Kaisha
 patents
4. 1 out of 2,463 
 
Jtekt Corporation
 patents
where one patent can have more than one assignee

Years Active: 1989-2013

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13 patents (USPTO):Explore Patents
1. 8591203 - Pump apparatus (2013-11-26),
2. 6287090 - Electric pump apparatus (2001-09-11),
3. 6233930 - Power steering device (2001-05-22),
4. 6048187 - Gear pump (2000-04-11),
5. 6004119 - Motor-driven hydraulic gear pump having a noise damper (1999-12-21),
6. 5356535 - Oil tank (1994-10-18),
7. 5280868 - Reservoir supporting structure (1994-01-25),
8. 5220939 - Flow control apparatus (1993-06-22),
9. 5074825 - Hydraulic transmission coupling apparatus (1991-12-24),
10. 4995491 - Power transmission apparatus (1991-02-26),
11. 4980521 - Power transmission apparatus (1990-12-25),
12. 4919248 - Drive coupling unit (1990-04-24),
13. 4850447 - Power transmission apparatus for a vehicle (1989-07-25),

Title: Yoshiaki Hamasaki: Innovator in Pump Technology

Introduction

Yoshiaki Hamasaki is a prominent inventor based in Kashiba, Japan, known for his significant contributions to pump technology. With a total of 13 patents to his name, he has developed innovative solutions that enhance the efficiency and functionality of pump apparatuses.

Latest Patents

Hamasaki's latest patents include a pump apparatus designed to reduce pulsation in hydraulic fluids. This invention features a reduction chamber and a remaining fluid inflow prevention pipe, which ensures fluid-tight sealing and improved performance. Another notable invention is an electric pump apparatus that simplifies assembly and integrates a suppression chamber for pulsation reduction. These advancements reflect his commitment to creating compact and efficient pumping solutions.

Career Highlights

Throughout his career, Yoshiaki Hamasaki has worked with notable companies such as Koyo Seiko Company, Ltd. and Mitsubishi Jidosha Kogyo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in pump technology and innovation.

Collaborations

Hamasaki has collaborated with talented individuals in the field, including Toshio Iida and Shuzo Hirakushi. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Yoshiaki Hamasaki's contributions to pump technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry, showcasing the importance of innovation in engineering.

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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