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For the Inventor, By the Inventor

Tokyo, Japan

Fidelix Y.k.


USPTO Granted Patents = 11

% Expired Patents = 54.5

Forward Citations = 261

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2 inventors (with patents filed for the assignee):

goldMedal Shin Nakagawa (8 out of 9 patents)

silverMedal Nakagawa Shin (3 out of 3 patents)


11 patents:

1. 7272019 - Switching power supply apparatus (2007-09-18),
2. 7023717 - Switching power supply apparatus (2006-04-04),
3. 6956748 - Switching power supply apparatus (2005-10-18),
4. 6678173 - Power supply apparatus for the reduction of power consumption (2004-01-13),
5. 6430062 - Power supply apparatus for the reduction of power consumption (2002-08-06),
6. 6429628 - Voltage step down type DC-DC converter having a coupled inductor (2002-08-06),
7. 6388905 - Single phase AC-DC converter having a power factor control function (2002-05-14),
8. 6307761 - Single stage high power-factor converter (2001-10-23),
9. 6104622 - Power supply apparatus for reduction of power consumption (2000-08-15),
10. 6088243 - Power supply apparatus (2000-07-11),
11. 5754666 - Method for reproducing audio signals and an apparatus therefore (1998-05-19),
Company Overview
Fidelix Y.K. is a Tokyo-based company specializing in advanced technology solutions, focusing on the development and manufacturing of innovative products in the fields of automation and control systems. The organization is dedicated to enhancing operational efficiency across various industries through its cutting-edge technologies. With a commitment to research and development, Fidelix Y.K. aims to provide tailored solutions that meet the evolving needs of its clients, contributing to the advancement of technology in Japan and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

11 Patents

#1,806 in Tokyo

#4,137 in Japan

#51,761 in the World

Tokyo, JP
Tokyo, Japan

Fidelix Y.k.

Forward Citations = 261

2 inventors:

goldMedal Shin Nakagawa (8 out of 9 patents)

silverMedal Nakagawa Shin (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Fidelix Y.k.. Retrieved from https://idiyas.com/company/fidelix-y-k

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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