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MCELROY GRUNOW ELECTRIC RAILWAY SYSTEM

Overview
  • Total Patents
    12
About

MCELROY GRUNOW ELECTRIC RAILWAY SYSTEM has a total of 12 patent applications. Its first patent ever was published in 1899. It filed its patents most often in United States and Canada. Its main competitors in its focus markets electrical machinery and energy and transport are MONT ELE S R L, MILLIKEN HUMPHREYS and KINGSLAND WILLIAM.

Patent filings in countries

World map showing MCELROY GRUNOW ELECTRIC RAILWAY SYSTEMs patent filings in countries
# Country Total Patents
#1 United States 10
#2 Canada 2

Patent filings per year

Chart showing MCELROY GRUNOW ELECTRIC RAILWAY SYSTEMs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Electrical machinery and energy
#2 Transport

Top inventors

# Name Total Patents
#1 Grunow William Jr 8
#2 Bourne Frank 2
#3 Grunow Wm 1
#4 Grunow William 1

Latest patents

Publication Filing date Title
US706012A Electromagnetic switch.
US706011A Art of controlling electrical switches operated by electromagnets.
CA73897A Current collector or trolley for electric railways
US678559A Current-collector or trolley for electric railways.
US662785A Apparatus for rupturing high-potential eletrical circuits without dangerous arcing.
US662423A Current-collector.
CA71238A Electric railway
US662422A Electrical resistance.
US662421A Electric railway.
US662419A Electric railway.
US662420A Electric railway.
US662784A Apparatus for interrupting relatively high potential circuits.