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NAT COAL DUMP CAR COMPANY

Overview
  • Total Patents
    30
About

NAT COAL DUMP CAR COMPANY has a total of 30 patent applications. Its first patent ever was published in 1901. It filed its patents most often in United States. Its main competitors in its focus markets transport and machines are JAC PATENT COMPANY, CLARK CAR COMPANY and ORTNER FREIGHT CAR CO.

Patent filings in countries

World map showing NAT COAL DUMP CAR COMPANYs patent filings in countries
# Country Total Patents
#1 United States 30

Patent filings per year

Chart showing NAT COAL DUMP CAR COMPANYs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Transport
#2 Machines

Top inventors

# Name Total Patents
#1 Otis Spencer 18
#2 Maltby George B 8
#3 Hart Harry Stillson 6
#4 Lipschutz Arthur 2
#5 Taylor Charles E 1
#6 Hubbard Fred M 1

Latest patents

Publication Filing date Title
US832555A Railway-car.
US814231A Dump-car.
US793150A Dump-car.
US780748A Dump-car.
US834824A Combination freight and dump car.
US814159A Dump-car.
US812359A Dump-car.
US767657A Dump-car.
US815032A Dump-car.
US808750A Dumping-car.
US780764A Railway-car.
US780763A Dump-car.
US780762A Drop-bottom dump-car.
US780761A Dump-car.
US780760A Dump-car.
US780759A Dump-car.
US834823A Combination freight and dump car.
US767312A Mechanism for operating dump-car doors.
US739894A Dump-car.
US739893A Dump-car.