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For the Inventor, By the Inventor

Shizuoka, Japan

Kenji Tokusa

This inventor holds 9 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1991-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenji Tokusa. Retrieved from https://idiyas.com/inventor/kenji-tokusa

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 = 6.0

ph-index = 6

Forward Citations = 221(Granted Patents)


Company Filing History:

goldMedal9 out of 42,726 
 
Hitachi, Ltd.
 patents

Years Active: 1991-2001

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9 patents (USPTO):Explore Patents
1. 6253567 - Ice thermal storage type air conditioner and ice thermal storage tank (2001-07-03),
2. 5956962 - Air conditioner (1999-09-28),
3. 5689965 - Air conditioner (1997-11-25),
4. 5279131 - Multi-airconditioner (1994-01-18),
5. 5277034 - Air conditioning system (1994-01-11),
6. 5214918 - Refrigerator and method for indicating refrigerant amount (1993-06-01),
7. 5159817 - Refrigerant path apparatus (1992-11-03),
8. 5148977 - Control system for air-conductioner (1992-09-22),
9. 5065588 - Air-conditioner system (1991-11-19),

Title: Kenji Tokusa: Innovator in Air Conditioning Technology

Introduction

Kenji Tokusa is a prominent inventor based in Shizuoka, Japan, known for his contributions to air conditioning technology. With a total of nine patents to his name, Tokusa has made significant advancements in the field, particularly in ice thermal storage systems.

Latest Patents

Among his latest innovations are the ice thermal storage type air conditioner and the ice thermal storage tank. The ice thermal storage type air conditioner features an outdoor unit equipped with a compressor and an outdoor heat exchanger, along with an indoor unit that includes an indoor heat exchanger and an expansion valve. The accompanying ice thermal storage tank is designed with a heat exchanger that functions as a condenser when utilizing accumulated heat. This heat exchanger incorporates a pipe-shaped heat transfer tube and a plate-shaped fin, which is installed vertically. Multiple rows of heat transfer tubes and fins are arranged to enhance efficiency. Additionally, his air conditioner invention comprises a first unit with a compressor and heat exchanger, a second unit with a heat exchanger, and a refrigerant circuit that connects both units, allowing for effective refrigerant flow.

Career Highlights

Kenji Tokusa is currently employed at Hitachi, Ltd., where he continues to develop innovative solutions in air conditioning technology. His work has been instrumental in improving energy efficiency and performance in climate control systems.

Collaborations

Throughout his career, Tokusa has collaborated with notable colleagues, including Kensaku Oguni and Susumu Nakayama. These partnerships have fostered a creative environment that has led to the development of cutting-edge technologies.

Conclusion

Kenji Tokusa's contributions to air conditioning technology, particularly through his innovative patents, have positioned him as a key figure in the industry. His work continues to influence advancements in energy-efficient climate control solutions.

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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