% Expired Patents = 50.0

EPO Patents = 1

Forward Citations = 45

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3 inventors (with patents filed for the assignee):

Martin Philip Riddiford (2 out of 123 patents)

Mark Lee Dempsey (1 out of 18 patents)

Abul Basher Khan (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 8050017 - Computer with a pen or touch sensitive display (2011-11-01),

2. 7355843 - Computer with a pen or touch sensitive display (2008-04-08),

3. 7127627 - Power management method and apparatus for use in electronic devices (2006-10-24),

4. 6812862 - Keyboard for an electronic device (2004-11-02),

Psion Digital Limited is a leading provider of rugged mobile computers and solutions for industrial and commercial use. With a focus on durability and reliability, we offer a range of products designed to withstand harsh environments and challenging conditions. Our innovative solutions help businesses improve efficiency, streamline processes, and enhance productivity in the field.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 22 2026

4 Patents

#657 in London

#3,860 in United Kingdom

London, United Kingdom

Psion Digital Limited

Forward Citations = 45

3 inventors:

Martin Philip Riddiford (2 out of 123 patents)

Mark Lee Dempsey (1 out of 18 patents)

Abul Basher Khan (1 out of 1 patent)

Please report any incorrect information to [email protected]

1 patent (EPO):

Please report any incorrect information to [email protected]