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For the Inventor, By the Inventor

Osaka, Japan

Matsushita Electric Corp., Ltd.

Calculating rank
USPTO Granted Patents = 8

Forward Citations = 52

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15 inventors (with patents filed for the assignee):

goldMedal Theodore S Rzeszewski (4 out of 37 patents)

silverMedal Hidekazu Hayama (1 out of 7 patents)

bronzeMedal Michiyoshi Nagashima (1 out of 46 patents)

4.  Yoshinari Takemura (1 out of 51 patents)

5.  Hajime Murakami (1 out of 4 patents)

6.  Yoshihiro Sakurai (1 out of 3 patents)

7.  Nozomu Arimoto (1 out of 10 patents)

8.  Kazufumi Ogawa (1 out of 216 patents)

9.  Hitoaki Tohda (1 out of 1 patent)

10.  Toshihide Takahashi (1 out of 2 patents)

11.  Hiroshi Sumida (1 out of 4 patents)

12.  Michiko Inui (1 out of 2 patents)

13.  Kiyoteru Enomoto (1 out of 2 patents)

14.  Takuya Inoue (1 out of 1 patent)

15.  Paul D Frantzis (1 out of 3 patents)


8 patents:

1. 5866278 - Electrolytic manganese dioxide, process for preparing the same, and (1999-02-02),
2. 5539275 - Display device and a method for producing the same (1996-07-23),
3. 4932015 - Method of reproducing signals from optical disk (1990-06-05),
4. 4698113 - Method of curing photocurable and heat-curable compositions and a method (1987-10-06),
5. 4360832 - Frequency synthesizer tuning system for television receivers (1982-11-23),
6. 4335396 - Automatic equalization system for television receiver (1982-06-15),
7. 4214274 - Frequency synthesizer tuning system with variable dwell signal seek (1980-07-22),
8. 4097812 - Frequency selective detector circuit (1978-06-27),
Company Overview
Matsushita Electric Corp., Ltd., better known as Panasonic, is a multinational electronics company headquartered in Japan. Founded in 1918, the company has since become one of the largest manufacturers of consumer electronics and home appliances. Panasonic is known for its high-quality products and innovative technology, with a focus on sustainability and corporate responsibility.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

8 Patents

#543 in Osaka

#5,050 in Japan

Osaka, JP
Osaka, Japan

Matsushita Electric Corp., Ltd.

Forward Citations = 52

15 inventors:

goldMedal Theodore S Rzeszewski (4 out of 37 patents)

silverMedal Hidekazu Hayama (1 out of 7 patents)

bronzeMedal Michiyoshi Nagashima (1 out of 46 patents)

4.  Yoshinari Takemura (1 out of 51 patents)

5.  Hajime Murakami (1 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Matsushita Electric Corp., Ltd.. Retrieved from https://idiyas.com/company/matsushita-electric

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]
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