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For the Inventor, By the Inventor

Yokosukashi, Japan

Yokosuka Telecom Research Park, Inc.

Calculating rank
USPTO Granted Patents = 8

% Expired Patents = 50.0

Forward Citations = 37

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12 inventors (with patents filed for the assignee):

goldMedal Ken Sakamura (8 out of 43 patents)

silverMedal Shingo Miyazaki (5 out of 18 patents)

bronzeMedal Koji Okada (5 out of 60 patents)

4.  Shigeyuki Fukushima (5 out of 6 patents)

5.  Chiaki Ishikawa (5 out of 5 patents)

6.  Noboru Koshizuka (5 out of 19 patents)

7.  Takanori Nakamizo (4 out of 6 patents)

8.  Akito Niwa (4 out of 6 patents)

9.  Kouya Tochikubo (4 out of 9 patents)

10.  Tatsushi Morokuma (3 out of 3 patents)

11.  Hisanori Matsumoto (3 out of 3 patents)

12.  Fumihiko Sano (1 out of 24 patents)


8 patents:

1. 8688969 - Cryptographic management apparatus, decryption management apparatus and program (2014-04-01),
2. 8417964 - Software module management device and program (2013-04-09),
3. 8406422 - Cryptographic module management apparatus, method, and program (2013-03-26),
4. 8396218 - Cryptographic module distribution system, apparatus, and program (2013-03-12),
5. 8370643 - Cryptographic module selecting device and program (2013-02-05),
6. D668640 - Antenna for wireless communication (2012-10-09),
7. D668639 - Antenna for wireless communication (2012-10-09),
8. D668638 - Antenna for wireless communication (2012-10-09),
Company Overview
Yokosuka Telecom Research Park, Inc. (YTRP) is a leading technology company based in Japan. We specialize in research and development in the telecom industry, providing innovative solutions and services to our clients. Our state-of-the-art research park is equipped with cutting-edge facilities and a team of skilled professionals dedicated to driving technological advancements in the telecom sector.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

8 Patents

#2 in Yokosukashi

#5,050 in Japan

Yokosukashi, JP
Yokosukashi, Japan

Yokosuka Telecom Research Park, Inc.

Forward Citations = 37

12 inventors:

goldMedal Ken Sakamura (8 out of 43 patents)

silverMedal Shingo Miyazaki (5 out of 18 patents)

bronzeMedal Koji Okada (5 out of 60 patents)

4.  Shigeyuki Fukushima (5 out of 6 patents)

5.  Chiaki Ishikawa (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Yokosuka Telecom Research Park, Inc.. Retrieved from https://idiyas.com/company/yokosuka-telecom-research-park

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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