For the Inventor, By the Inventor

Enter assignee name

Hitachi Appliances, Inc

USPTO Granted Patents = 48

% Expired Patents = 56.3

EPO Patents = 10

Forward Citations = 333

Loading Chart...

Loading Chart...

109 inventors (with patents filed for the assignee):

Mutsunori Matsunaga (13 out of 24 patents)

Takeshi Tsuchiya (8 out of 31 patents)

Kenji Tojo (8 out of 54 patents)

4. Satoshi Nakamura (8 out of 9 patents)

5. Masatsugu Chikano (7 out of 10 patents)

6. Tomio Yoshikawa (7 out of 7 patents)

7. Satoshi Kikuchi (7 out of 40 patents)

8. Baiying Huang (6 out of 6 patents)

9. Haruo Koharagi (6 out of 34 patents)

10. Yuuichi Yanagase (5 out of 17 patents)

11. Masashi Miyake (5 out of 8 patents)

12. Akeshi Takahashi (5 out of 6 patents)

13. Masaru Ohtahara (4 out of 8 patents)

14. Zhuonan Wang (4 out of 8 patents)

15. Yuji Enomoto (4 out of 67 patents)

Core Competencies:

Scroll Compressor

Power Monitoring

Air Conditioning

Permanent Magnet Motor

Heat Pump

Refrigerating Apparatus

Vacuum Insulation

Self-Starting Motor

Compressor Control

Hot Water Supply

Electrical Machine

Bypass Valve

48 patents: Sort by Forward Citations

1. 9766679 - Power monitoring device and power monitoring system (2017-09-19),

2. 9651272 - Air-conditioning control system and air-conditioning control method (2017-05-16),

3. 9353751 - Sealed scroll compressor for helium (2016-05-31),

4. 9239053 - Hermetically sealed scroll compressor (2016-01-19),

5. 9181945 - Scroll compressor with channels intermittently communicating internal and external compression chambers with back pressure chamber (2015-11-10),

6. 9169840 - Piston operated bypass valve for a screw compressor (2015-10-27),

7. 9091266 - Scroll compressor having a back pressure control valve for opening and closing a communication path in a stationary scroll (2015-07-28),

8. 9010281 - Hot water supply system (2015-04-21),

9. 8992188 - Revolution type compressor (2015-03-31),

10. 8937422 - Magnetic iron core, method for manufacturing the same, axial-gap rotating electrical machine, and static electrical machine (2015-01-20),

11. 8888476 - Horizontal scroll compressor (2014-11-18),

12. 8888475 - Scroll compressor with oil supply across a sealing part (2014-11-18),

13. 8847534 - Converter, motor driving module, and refrigerating apparatus (2014-09-30),

14. 8836192 - Axial gap rotating electrical machine and rotor used therefor (2014-09-16),

15. 8786155 - Axial gap rotating electrical machine (2014-07-22),

Company Overview

Hitachi Appliances, Inc., based in Tokyo, specializes in advanced technologies for climate control and energy efficiency. The company focuses on the development and manufacturing of power monitoring devices, air-conditioning systems, and various types of compressors, including scroll and hermetically sealed models. Additionally, Hitachi is known for its innovations in heat pump hot water supply systems and vacuum insulation panels, contributing to sustainable solutions in heating and refrigeration across diverse applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

48 Patents

#814 in Tokyo

#1,756 in Japan

#14,550 in the World

Hitachi Appliances, Inc

Forward Citations = 333

109 inventors:

Mutsunori Matsunaga (13 out of 24 patents)

Takeshi Tsuchiya (8 out of 31 patents)

Kenji Tojo (8 out of 54 patents)

4. Satoshi Nakamura (8 out of 9 patents)

5. Masatsugu Chikano (7 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Appliances, Inc. Retrieved from https://idiyas.com/company/hitachi-appliances

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

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]

Loading…