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PERCY E DONNER

Overview
  • Total Patents
    33
About

PERCY E DONNER has a total of 33 patent applications. Its first patent ever was published in 1906. It filed its patents most often in United States. Its main competitors in its focus markets transport, mechanical elements and machine tools are ZEFTRON INC, NIPPON AIR BRAKE CO and WESTINGHOUSE BREMSEN APPARATE.

Patent filings in countries

World map showing PERCY E DONNERs patent filings in countries
# Country Total Patents
#1 United States 33

Patent filings per year

Chart showing PERCY E DONNERs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Snyder Jacob Rush 27
#2 Hogle Milton W 4
#3 Slick William W 3
#4 Finley Walter Arthur 1
#5 Baader Stephan 1

Latest patents

Publication Filing date Title
US1290389A Power reverse-gear.
US1299284A Reversing-gear mechanism.
US1302096A Steam-engine reversing-gear.
US1252190A Steam-engine reversing-gear.
US1295934A Valve reversing gear.
US1212830A Steam-engine reversing-gear.
US1250829A Rebound-check.
US1214965A Steam-engine reversing-gear.
US1185947A Release-valve for triple-valve mechanism.
US1231081A Air-brake system.
US1231214A Triple valve.
US1085764A Triple valve.
US1164025A Triple valve.
US1136057A Triple valve.
US1102100A Engineer's brake-valve.
US1097060A Triple valve.
US1097059A Triple valve.
US1097061A Triple valve.
US1177969A Triple valve.
US1094945A Quick-recharging valve.