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For the Inventor, By the Inventor

Saitama, Japan

Masaharu Tsuboi

This inventor holds 21 USPTO granted patents and 1 EPO patent, primarily in Motorcycle Technology. Top assignees: Honda Giken Kogyo Kabushiki Kaisha, Koganei Seiki Co., Ltd.. Active years: 1980-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaharu Tsuboi. Retrieved from https://idiyas.com/inventor/masaharu-tsuboi

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

USPTO Granted Patents = 21

% Patents Active = 95.2


Average Co-Inventor Count = 1.1

ph-index = 10

Forward Citations = 396(Granted Patents)


Location History:

  • Tokorozawa, JP (1980 - 1984)
  • Saitama, JP (1984 - 2004)
  • Sayama, JP (1984 - 2013)

Company Filing History:

goldMedal20 out of 10,092 
 
Honda Giken Kogyo Kabushiki Kaisha
 patents
silverMedal1 out of 2 
 
Koganei Seiki Co., Ltd.
 patents

Years Active: 1980-2013

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Areas of Expertise:
Diesel Pump
Motor-Assisted Vehicle
Battery Exchange
Power Unit
Motorcycle Suspension
V-Type Engine
Clutch Release
Power Transmission
Speed Change Device
Chain Tightening
Burglarproof Apparatus
Carburetor System
21 patents (USPTO):Explore Patents
1. 8545192 - Diesel pump with cylinder and outlet joint arrangement (2013-10-01),
2. 6836037 - Motor-assisted drive unit for motor-assisted vehicle (2004-12-28),
3. 6591929 - Motor-assisted bicycle and power unit (2003-07-15),
4. 6498457 - Battery exchange apparatus (2002-12-24),
5. 6423443 - Battery mounting structure in power assisted bicycle (2002-07-23),
6. D440200 - Battery (2001-04-11),
7. D438825 - Power unit for bicycle (2001-03-14),
8. 4706774 - Motorcycle rear suspension subassembly (1987-11-17),
9. 4674455 - Split crankcase for V-type engine (1987-06-23),
10. 4631469 - Device for driving electrical current generator for use in motorcycle (1986-12-23),
11. 4589382 - V-type multicylinder internal combustion engine (1986-05-20),
12. 4566577 - Clutch release device for motorized cycles (1986-01-28),
13. 4515038 - Power transmission mechanism for motorcycles (1985-05-07),
14. 4510820 - Drum type switch-over mechanism for a speed change device (1985-04-16),
15. 4480603 - Chain tightening mechanism for DOHC engine (1984-11-06),

Title: Masaharu Tsuboi - Innovative Inventor from Saitama

Introduction: Masaharu Tsuboi is a renowned inventor hailing from Saitama, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Masaharu Tsuboi holds several patents in the areas of robotics, artificial intelligence, and renewable energy, showcasing his continuous dedication to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Masaharu Tsuboi has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs.

Collaborations: Throughout his career, Masaharu Tsuboi has collaborated with top researchers, engineers, and scientists both locally and internationally, fostering a culture of innovation and knowledge sharing.

Conclusion: Masaharu Tsuboi's passion for innovation and his relentless pursuit of technological excellence have solidified his reputation as a visionary inventor in Saitama 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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