% Expired Patents = 100.0

Forward Citations = 23

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2 inventors (with patents filed for the assignee):

David John Parkinson (2 out of 18 patents)

James Edward Delves (1 out of 9 patents)

3 patents: Sort by Forward Citations

1. 8371323 - Method and apparatus for transporting a particulate material (2013-02-12),

2. 8114283 - Separator to separate a liquid/liquid/gas/solid mixture (2012-02-14),

3. 7997419 - Fluidizing apparatus (2011-08-16),

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USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#61 in Bristol

#4,894 in United Kingdom

Bristol, United Kingdom

Dps Bristol (Holdings) Limited

Forward Citations = 23

2 inventors:

David John Parkinson (2 out of 18 patents)

James Edward Delves (1 out of 9 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dps Bristol (Holdings) Limited. Retrieved from https://idiyas.com/company/dps-bristol-holdings

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]