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For the Inventor, By the Inventor

Toyota, Japan

Masakazu Ishikawa

This inventor holds 24 USPTO granted patents, primarily in Automotive Braking Systems. Top assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha. Active years: 1976-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masakazu Ishikawa. Retrieved from https://idiyas.com/inventor/masakazu-ishikawa

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

USPTO Granted Patents = 24

% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 10

Forward Citations = 224(Granted Patents)


Location History:

  • Toyota, JA (1976 - 1978)
  • Toyotashi, JP (1980)
  • Aichi, JP (1980 - 1981)
  • Toyoake, JP (1986)
  • Toyota, JP (1979 - 1990)

Company Filing History:

goldMedal16 out of 1,838 
 
Toyota Jidosha Kogyo Kabushiki Kaisha
 patents
silverMedal8 out of 5,207 
 
Aisin Seiki Kabushiki Kaisha
 patents
bronzeMedal7 out of 38,837 
 
Toyota Jidosha Kabushiki Kaisha
 patents
4. 1 out of 1 
 
Hosei Buleki Kogyo Kabushiki Kaisha
 patent
5. 1 out of 1 
 
Sumitomo Denki Kogyo K.k.
 patent
where one patent can have more than one assignee

Years Active: 1976-1990

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Areas of Expertise:
Manual Transmission
Hydraulic Brake System
Wheel Slip Control
Disc Brake
Suspension System
Brake Wear Detector
Anti-Rattle Spring
Brake Failure Indicator
Caliper Mounting
Rust Prevention
Vibration Control
Fluid Level Warning
24 patents (USPTO):Explore Patents
1. 4916960 - Manual transmission for motor vehicle (1990-04-17),
2. 4901590 - Manual transmission for motor vehicle (1990-02-20),
3. 4869122 - Manual transmission for motor vehicle (1989-09-26),
4. 4715664 - Hydraulic anti-skid brake system with device for improvement in (1987-12-29),
5. 4681373 - Wheel slip control system (1987-07-21),
6. 4668024 - Solenoid-operated hydraulic control device for anti-skid brake system (1987-05-26),
7. 4648663 - Wheel slip controlling system (1987-03-10),
8. 4594912 - Banjo type axle casing (1986-06-17),
9. 4321590 - Check mechanism for fluid level warning device in fluid reservoirs (1982-03-23),
10. 4296841 - Antirattle spring for a disc brake of vehicles (1981-10-27),
11. 4214649 - Antirattle spring for a disc brake of vehicles (1980-07-29),
12. 4214648 - Vehicle disc brake (1980-07-29),
13. 4210343 - Automotive suspension system (1980-07-01),
14. 4207971 - Rust preventing device for a rotor of a disc brake (1980-06-17),
15. 4188073 - Anti-vibration apparatus for a vehicle brake system (1980-02-12),

Title: The Innovative Journey of Masakazu Ishikawa

Introduction: Masakazu Ishikawa is a renowned inventor hailing from Toyota, Japan, known for his groundbreaking contributions to the field of automotive technology.

Latest Patents: Masakazu Ishikawa holds several patents related to hybrid vehicle systems, energy-efficient engines, and advanced safety features in automobiles.

Career Highlights: With a career spanning over two decades at Toyota, Ishikawa has played a pivotal role in the development of eco-friendly vehicles and cutting-edge automotive technologies.

Collaborations: Throughout his career, Masakazu Ishikawa has collaborated with top engineers, designers, and researchers within Toyota and across the automotive industry to bring innovative concepts to life.

Conclusion: Masakazu Ishikawa's passion for innovation and his relentless drive to push the boundaries of automotive technology have solidified his reputation as a visionary inventor in the industry.

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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