P.s.l. Limited

Calculating rank

USPTO Granted Patents = 11

% Expired Patents = 9.1

Trademarks = 1

Forward Citations = 276

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4 inventors (with patents filed for the assignee):

Chun Fai Leung (10 out of 19 patents)

Paul So Wing Keung (1 out of 1 patent)

Tam Wing Hong (1 out of 1 patent)

4. Leung Chun Fai (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 8506158 - Watch (2013-08-13),

2. D662078 - Headphone (2012-06-19),

3. D657366 - Figure shaped USB memory device (2012-04-10),

4. D612269 - Slap-on watch (2010-03-23),

5. D594870 - Figure shaped USB memory (2009-06-23),

6. D570792 - Remote control with laser pointer and mouse (2008-06-10),

7. D568313 - USB memory with laser pointer and remote control (2008-05-06),

8. D567242 - Mouse with speaker and microphone (2008-04-22),

9. D564904 - Combined USB memory device and watch (2008-03-25),

10. D550107 - Wrist band pedometer (2007-09-04),

11. D541451 - Pedometer with radio and flashlight (2007-04-24),

Company Overview

P.s.l. Limited is a Hong Kong-based company specializing in the development and manufacturing of advanced electronic components and systems. The organization focuses on innovative solutions across various sectors, including telecommunications, consumer electronics, and industrial applications. With a commitment to research and development, P.s.l. Limited aims to enhance product performance and reliability, catering to both local and international markets. The company is dedicated to leveraging cutting-edge technology to meet the evolving needs of its clients.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

11 Patents

#288 in

#2,570 in HK

#51,831 in the World

Hong Kong, China

P.s.l. Limited

Forward Citations = 276

4 inventors:

Chun Fai Leung (10 out of 19 patents)

Paul So Wing Keung (1 out of 1 patent)

Tam Wing Hong (1 out of 1 patent)

4. Leung Chun Fai (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: P.s.l. Limited. Retrieved from https://idiyas.com/company/p-s-l

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]