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Hitachi Communication Technologies, Ltd.

USPTO Granted Patents = 129

Forward Citations = 1,017

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214 inventors (with patents filed for the assignee):

Hiroaki Miyata (13 out of 41 patents)

Tohru Kazawa (10 out of 65 patents)

Yoshihiro Ashi (8 out of 89 patents)

4. Hiroyuki Nakano (8 out of 79 patents)

5. Ryosuke Kurata (8 out of 19 patents)

6. Kenzaburo Fujishima (7 out of 44 patents)

7. Koichi Okita (7 out of 17 patents)

8. Takashi Yano (6 out of 103 patents)

9. Yusuke Yajima (6 out of 75 patents)

10. Tetsuya Uda (6 out of 22 patents)

11. Yasuyuki Fukashiro (6 out of 33 patents)

12. Masahiko Mizutani (6 out of 44 patents)

13. Toshiyuki Saito (6 out of 29 patents)

14. Migaku Ota (6 out of 7 patents)

15. Takahiro Yoshida (5 out of 23 patents)

Core Competencies:

Access Gateway

Passive Optical Network

Wireless Communication

Optical Transmission

Multicast Packet Relay

Base Station Control

Wavelength Division Multiplexing

Dynamic VLAN Assignment

Packet Forwarding

SIP Exchange

Error Correction Decoder

Optical Add-Drop Multiplexer

129 patents: Sort by Forward Citations

1. 8446816 - Control method for access gateway and communication system (2013-05-21),

2. 8391308 - DOCSIS PON (2013-03-05),

3. 8280371 - Base station and receiver failure diagnosing method (2012-10-02),

4. 8107461 - SIP exchange system (2012-01-31),

5. 8036607 - Wireless terminal and wireless base station (2011-10-11),

6. 8005363 - Passive optical network with wavelength division multiplexing (2011-08-23),

7. 7996033 - Radio communication system and base station (2011-08-09),

8. 7830924 - Stuffing and destuffing operations when mapping low-order client signals into high-order transmission frames (2010-11-09),

9. 7796741 - Call connection control unit and call connection control method (2010-09-14),

10. 7756057 - Method and apparatus for determining transmission rate based on number of unused slots (2010-07-13),

11. 7751394 - Multicast packet relay device adapted for virtual router (2010-07-06),

12. 7751381 - Wireless base station using weighting elements of an array antenna (2010-07-06),

13. 7729699 - Switching center for mobile handover (2010-06-01),

14. 7725034 - Optical transmision apparatus and control method therefor (2010-05-25),

15. 7702366 - Base station and base station controller for transmission of prioritized packets (2010-04-20),

Hitachi Communication Technologies, Ltd. is a subsidiary of Hitachi, Ltd., specializing in providing advanced communication technology solutions. With a focus on innovation and quality, the company offers a wide range of products and services related to telecommunications infrastructure, including network systems, optical communication systems, and information and communication technologies. Hitachi Communication Technologies is committed to driving digital transformation and contributing to the development of a connected world.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 13 2026

129 Patents

#411 in Tokyo

#929 in Japan

#6,061 in the World

Hitachi Communication Technologies, Ltd.

Forward Citations = 1,017

214 inventors:

Hiroaki Miyata (13 out of 41 patents)

Tohru Kazawa (10 out of 65 patents)

Yoshihiro Ashi (8 out of 89 patents)

4. Hiroyuki Nakano (8 out of 79 patents)

5. Ryosuke Kurata (8 out of 19 patents)

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