% Expired Patents = 50.0

Forward Citations = 4

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2 inventors (with patents filed for the assignee):

Robert Crocker (2 out of 2 patents)

Justin James Robert Stroud (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 9254851 - Sensor assembly (2016-02-09),

2. 8181529 - System and method for the detection of faults in rails (2012-05-22),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#23 in Derby

#6,532 in United Kingdom

Derby, United Kingdom

Sperry Rail International Limited

Forward Citations = 4

2 inventors:

Robert Crocker (2 out of 2 patents)

Justin James Robert Stroud (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sperry Rail International Limited. Retrieved from https://idiyas.com/company/sperry-rail-international

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]