% Expired Patents = 57.1

Forward Citations = 275

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18 inventors (with patents filed for the assignee):

Masayuki Sakurai (4 out of 5 patents)

Ryouji Sugiura (3 out of 3 patents)

Kazumitsu Ishikawa (3 out of 3 patents)

4. Satoshi Isoda (2 out of 2 patents)

5. Hiroyuki Kudoh (2 out of 2 patents)

6. Kenichi Masuda (1 out of 6 patents)

7. Takanori Nishida (1 out of 1 patent)

8. Hideki Yoshida (1 out of 1 patent)

9. Yasuaki Nakamura (1 out of 1 patent)

10. Toshiro Okamura (1 out of 15 patents)

11. Hiroyoshi Yokoyama (1 out of 4 patents)

12. Shoji Oikawa (1 out of 1 patent)

13. Haruo Suzuki (1 out of 1 patent)

14. Youiti Matuda (1 out of 1 patent)

15. Koichi Noguchi (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 7777238 - Chip-type light emitting device and wiring substrate for the same (2010-08-17),

2. 7626211 - LED reflecting plate and LED device (2009-12-01),

3. 6777612 - Electronic device sealing electronic element therein and manufacturing method thereof, and printed wiring board suitable for such electronic device (2004-08-17),

4. 6600214 - Electronic component device and method of manufacturing the same (2003-07-29),

5. 6555756 - Printed wiring board having cavity for mounting electronic parts therein and method for manufacturing thereof (2003-04-29),

6. 5826330 - Method of manufacturing multilayer printed wiring board (1998-10-27),

7. 5243142 - Printed wiring board and process for producing the same (1993-09-07),

Company Overview

Hitachi Aic Inc. is a leading manufacturer of air conditioning systems and solutions for residential, commercial, and industrial applications. With a strong commitment to innovation, quality, and sustainability, Hitachi Aic Inc. offers a wide range of products designed to provide superior comfort and energy efficiency.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

7 Patents

#2,284 in Tokyo

#5,450 in Japan

Tokyo, Japan

Hitachi Aic Inc.

Forward Citations = 275

18 inventors:

Masayuki Sakurai (4 out of 5 patents)

Ryouji Sugiura (3 out of 3 patents)

Kazumitsu Ishikawa (3 out of 3 patents)

4. Satoshi Isoda (2 out of 2 patents)

5. Hiroyuki Kudoh (2 out of 2 patents)

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

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]