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For the Inventor, By the Inventor

Tokyo, Japan

Tamura Electric Works, Ltd.

USPTO Granted Patents = 61


Forward Citations = 752

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99 inventors (with patents filed for the assignee):

goldMedal Osamu Kai (9 out of 10 patents)

silverMedal Hiroshi Sasou (7 out of 7 patents)

bronzeMedal Ryuzo Sugiura (6 out of 6 patents)

4.  Shuichi Tamura (5 out of 20 patents)

5.  Yoshiaki Takeda (4 out of 5 patents)

6.  Junzo Kikuchi (4 out of 4 patents)

7.  Senji Okumura (4 out of 4 patents)

8.  Shinji Fukaya (3 out of 8 patents)

9.  Takashi Oyamada (3 out of 27 patents)

10.  Kenichi Kanno (3 out of 12 patents)

11.  Yoshiki Sano (3 out of 3 patents)

12.  Tosiaki Watanabe (3 out of 3 patents)

13.  Mitsuhiro Okazaki (3 out of 3 patents)

14.  Toshiharu Kinoshita (3 out of 3 patents)

15.  Hisami Ojima (3 out of 3 patents)


Core Competencies:
Card Issuing Apparatus
Prepaid Card System
Card Reader
Public Telephone System
Data Transmission
Coin Discrimination
Telephone Set
Alarm Information Transmission
Digital Clock
Electromagnetic Counters
Task Processing
Key Telephone System

61 patents:

1. 5714743 - Card and card issuing apparatus (1998-02-03),
2. 5661289 - Card and card check method (1997-08-26),
3. 5600122 - Structure of card insertion port and method of mounting card insertion (1997-02-04),
4. 5592400 - Card issue system (1997-01-07),
5. 5563934 - Pay phone call control apparatus for allowing calls using pre-paid cards (1996-10-08),
6. 5546446 - Public telephone system using a prepaid card to enable communication (1996-08-13),
7. 5545884 - Card reader apparatus (1996-08-13),
8. 5545883 - Magnetic card and card reader apparatus utilizing a pseudo bar code and (1996-08-13),
9. 5508854 - Apparatus for writing data on a magnetic card and preventing heat damage (1996-04-16),
10. 5484993 - Card reader maintenance system (1996-01-16),
11. 5463679 - Public telephone system (1995-10-31),
12. 5463208 - Task processing apparatus (1995-10-31),
13. 5448628 - Public telephone system (1995-09-05),
14. 5433583 - Card loading device (1995-07-18),
15. 5424522 - Card convey device and method therefor (1995-06-13),
Company Overview
Tamura Electric Works, Ltd., based in Tokyo, Japan, specializes in advanced card technology solutions. The company focuses on the development and manufacturing of card issuing apparatus, prepaid card systems, and card readers, catering to various sectors including telecommunications and public services. Additionally, Tamura is involved in innovations related to public telephone systems, data transmission, coin discrimination, and alarm information transmission, positioning itself as a key player in the evolving landscape of electronic payment and communication technologies.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

61 Patents

#713 in Tokyo

#1,512 in Japan

#11,930 in the World

Tokyo, JP
Tokyo, Japan

Tamura Electric Works, Ltd.

Forward Citations = 752

99 inventors:

goldMedal Osamu Kai (9 out of 10 patents)

silverMedal Hiroshi Sasou (7 out of 7 patents)

bronzeMedal Ryuzo Sugiura (6 out of 6 patents)

4.  Shuichi Tamura (5 out of 20 patents)

5.  Yoshiaki Takeda (4 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tamura Electric Works, Ltd.. Retrieved from https://idiyas.com/company/tamura-electric-works

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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