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For the Inventor, By the Inventor

Shizuoka, Japan

Takuho Hirahara

This inventor holds 12 USPTO granted patents. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1984-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takuho Hirahara. Retrieved from https://idiyas.com/inventor/takuho-hirahara

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

Calculating rank
USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 4.8

ph-index = 8

Forward Citations = 162(Granted Patents)


Company Filing History:

goldMedal12 out of 21,351 
 
Mitsubishi Denki Kabushiki Kaisha
 patents

Years Active: 1984-1996

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12 patents (USPTO):Explore Patents
1. 5531080 - Refrigerant circulating system (1996-07-02),
2. 4826409 - Closed type rotary compressor with rotating member to prevent back (1989-05-02),
3. 4764097 - Two-cylinder type rotary compressor (1988-08-16),
4. 4704076 - Rotary compressor (1987-11-03),
5. 4676726 - Rotary compressor (1987-06-30),
6. 4645429 - Rotary compressor (1987-02-24),
7. 4636152 - Rotary compressor (1987-01-13),
8. 4624630 - Differential pressure lubrication system for rolling piston compressor (1986-11-25),
9. 4592705 - Lubrication for rotary compressor vane (1986-06-03),
10. 4580604 - Discharging valve device for a compressor (1986-04-08),
11. 4560329 - Strainer device for rotary compressor (1985-12-24),
12. 4487555 - Hermetic motor compressor (1984-12-11),

Title: Takuho Hirahara: Innovator in Refrigeration Technology

Introduction

Takuho Hirahara is a prominent inventor based in Shizuoka, Japan. He has made significant contributions to the field of refrigeration technology, holding a total of 12 patents. His innovative designs focus on improving the efficiency and reliability of refrigerant systems.

Latest Patents

Hirahara's latest patents include a refrigerant circulating system that utilizes a highly polar refrigerant, such as hydrofluorocarbon-based ones, along with a refrigerating oil that has slight solubility with the liquid refrigerant on the condensation side. This system enhances electrical insulation and moisture resistance, ensuring good oil return to the compressor and high reliability. Another notable patent is for a closed type rotary compressor designed to prevent backflow. This compressor features a closed housing, a driving electric motor, and a unique arrangement of components that optimize refrigerant gas intake and discharge.

Career Highlights

Hirahara is currently employed at Mitsubishi Denki Kabushiki Kaisha, where he continues to develop cutting-edge refrigeration technologies. His work has been instrumental in advancing the efficiency of refrigeration systems, making them more reliable and environmentally friendly.

Collaborations

Throughout his career, Hirahara has collaborated with notable colleagues, including Susumu Kawaguchi and Kazuhiro Nakane. These partnerships have fostered innovation and contributed to the success of various projects.

Conclusion

Takuho Hirahara's contributions to refrigeration technology exemplify his dedication to innovation and efficiency. His patents reflect a commitment to improving the reliability and performance of refrigerant systems, making a lasting impact 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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