Learn more

POWELL DUFFRYN RAIL LTD

Overview
  • Total Patents
    23
About

POWELL DUFFRYN RAIL LTD has a total of 23 patent applications. Its first patent ever was published in 1997. It filed its patents most often in United Kingdom, EPO (European Patent Office) and Canada. Its main competitors in its focus markets transport and mechanical elements are STEFAN COLOMAN, HEWITT HERBERT HILLS and KIRBY EQUIPMENT COMPANY.

Patent filings in countries

World map showing POWELL DUFFRYN RAIL LTDs patent filings in countries

Patent filings per year

Chart showing POWELL DUFFRYN RAIL LTDs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Hewitt Paul 9
#2 Latham Joseph 3
#3 Smith Brian 2
#4 Kibble Michael 2
#5 Harding Alan 2
#6 Long Jack R 1
#7 Tandy David W 1
#8 Alan Clark Richard 1
#9 Clark Richard Alan 1
#10 Smith Brian Leslie 1

Latest patents

Publication Filing date Title
CA2488530A1 Resilient damping friction wedge
GB0314399D0 Side bearer
GB0312870D0 Side bearer
GB0312390D0 Rocker arrangement
GB0312276D0 Resilient damping friction wedge
GB0311867D0 Railcar truck
GB0311480D0 Improvements in the track friendliness of Y25 bogie
GB0009265D0 Suspension limiter
GB0009264D0 Three piece bogie arrangement
EP0879750A1 Improvements in bogie trucks for rail vehicles