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CENTRAL RAILWAY SIGNAL CO

Overview
  • Total Patents
    130
About

CENTRAL RAILWAY SIGNAL CO has a total of 130 patent applications. Its first patent ever was published in 1908. It filed its patents most often in United States and Canada. Its main competitors in its focus markets transport, machines and basic materials chemistry are HENRI COUSIN, FRANK DUTCHER and LLEWELLYN WYNN WILLIAMS.

Patent filings in countries

World map showing CENTRAL RAILWAY SIGNAL COs patent filings in countries
# Country Total Patents
#1 United States 94
#2 Canada 36

Patent filings per year

Chart showing CENTRAL RAILWAY SIGNAL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dutcher Frank 78
#2 Frank Dutcher 18
#3 Bemisderfer Harvey O 6
#4 Pfeil Elmer C 5
#5 Clark Robert M 4
#6 Edmands John W 4
#7 Ross Louis S 3
#8 Wiley Edmands John 3
#9 Clark Cadwallader J 2
#10 Wedger Walter L 2

Latest patents

Publication Filing date Title
US2391823A Igniter for grenades and the like
US1807456A Fire extinguishing composition
US1776354A Support for time burning signals and other pyrotechnical devices
US1704231A Safety railway signal torpedo and process of making the same
US1504032A Railway signal torpedo
US1517966A Railway signal torpedo
US1458745A Railway signal torpedo
US1452997A Railway signal torpedo
US1486014A Flare light
US1475805A Railway signal torpedo
US1403490A Railway signal torpedo
US1430959A Time burning railway signal fusee
US1402583A Railway signal torpedo
US1421188A Railway signal torpedo
US1385315A Railway signal-torpedo
US1398846A Railway signal-torpedo
US1385316A Railway signal-torpedo
US1385314A Railway signal-torpedo
US1414264A Railway signal torpedo
US1385312A Railway signal-torpedo