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For the Inventor, By the Inventor

Hitachi, Japan

Yasumasa Tamai

This inventor holds 10 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Kyowa Kogyo Co., Ltd.. Active years: 1981-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasumasa Tamai. Retrieved from https://idiyas.com/inventor/yasumasa-tamai

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 4.0

ph-index = 7

Forward Citations = 197(Granted Patents)


Company Filing History:

goldMedal10 out of 42,740 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 3 
 
Hitachi Kyowa Kogyo Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1981-1999

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10 patents (USPTO):Explore Patents
1. 5977515 - Underwater laser processing device including chamber with partitioning (1999-11-02),
2. 5938954 - Submerged laser beam irradiation equipment (1999-08-17),
3. 5674419 - Method for weld repairing of structures in nuclear reactors (1997-10-07),
4. 5494539 - Metal member quality improving method by spot welding (1996-02-27),
5. 5305361 - Method of and apparatus for water-jet peening (1994-04-19),
6. 5022936 - Method for improving property of weld of austenitic stainless steel (1991-06-11),
7. 4601872 - Water sealing device for use in replacing control rod drive housing (1986-07-22),
8. 4440339 - Method of repairing housing of control rod driving system (1984-04-03),
9. 4262517 - Method of correcting distorted pipe end (1981-04-21),
10. 4247037 - Method for welding tubular members of stainless steel (1981-01-27),

Title: The Innovative Journey of Inventor Yasumasa Tamai

Introduction: Yasumasa Tamai is a pioneering inventor hailing from Hitachi, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Yasumasa Tamai holds several patents in the areas of electronics, robotics, and artificial intelligence, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Tamai has worked extensively in research and development at Hitachi, playing a key role in the creation of cutting-edge technologies that have revolutionized various industries.

Collaborations: Throughout his career, Yasumasa Tamai has collaborated with leading experts in the field, both within Hitachi and in the broader scientific community, fostering a culture of innovation and knowledge sharing.

Conclusion: Yasumasa Tamai's relentless pursuit of innovation and his passion for pushing the limits of technology have solidified his position as a visionary inventor in the realm of electronics and robotics. His work continues to inspire future generations of inventors and researchers in Japan and beyond.

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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