Yosio Kuroiwa

This inventor holds 9 USPTO granted patents. Top assignees: Toyota Jidosha Kabushiki Kaisha, Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1979-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yosio Kuroiwa. Retrieved from https://idiyas.com/inventor/yosio-kuroiwa

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 3.1

ph-index = 4

Forward Citations = 37(Granted Patents)

Company Filing History:

7 out of 38,912

Toyota Jidosha Kabushiki Kaisha

patents

2 out of 1,838

Toyota Jidosha Kogyo Kabushiki Kaisha

patents

Years Active: 1979-1989

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4869623 - Method of broaching outer periphery of lobe-type rotor of roots-type (1989-09-26),

2. 4730963 - Broaching machine for external broaching of rotor (1988-03-15),

3. 4701085 - Method and apparatus for external broaching of resin-coated parts (1987-10-20),

4. 4693813 - Method of broaching outer periphery of lobe-type rotor of roots-type (1987-09-15),

5. 4416242 - Intake heating apparatus of an internal combustion engine (1983-11-22),

6. 4407254 - Intake heating apparatus of an internal combustion engine (1983-10-04),

7. 4399796 - Intake heating device of an internal combustion engine (1983-08-23),

8. 4398522 - Intake heating device of an internal combustion engine (1983-08-16),

9. 4158351 - Flow control valve for an exhaust gas recirculation apparatus of an (1979-06-19),

Title: Yosio Kuroiwa: Innovator in Rotary Fluid Machinery

Introduction

Yosio Kuroiwa is a notable inventor based in Toyota, Japan. He has made significant contributions to the field of rotary fluid machinery, holding a total of 9 patents. His innovative approaches have led to advancements in broaching methods and machinery design.

Latest Patents

Kuroiwa's latest patents include a method for broaching the outer periphery of lobe-type rotors used in rotary fluid machines. This method involves forming chip-breaker grooves in the resin layer of the rotor, which enhances the finishing process. Additionally, he has developed a broaching machine specifically designed for the external broaching of rotor assemblies. This machine features a support shaft and centering devices that ensure accurate alignment during the broaching process.

Career Highlights

Throughout his career, Kuroiwa has worked with prominent companies such as Toyota Motor Corporation and Toyota Jidosha Kogyo Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Kuroiwa has collaborated with talented individuals in his field, including Keigo Kato and Takuo Sibata. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Yosio Kuroiwa's work in the field of rotary fluid machinery exemplifies the spirit of innovation. His patents and career achievements highlight his dedication to advancing technology in this specialized area.

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]