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SPRAGUE SAFETY CONTROL AND SIG

Overview
  • Total Patents
    12
About

SPRAGUE SAFETY CONTROL AND SIG has a total of 12 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets transport and electrical machinery and energy are CONTINUOUS TRAIN CONTROL CORP, BROOKINS ANDREW J and REGAN SAFETY DEVICES CO INC.

Patent filings in countries

World map showing SPRAGUE SAFETY CONTROL AND SIGs patent filings in countries
# Country Total Patents
#1 United States 7
#2 United Kingdom 4
#3 Canada 1

Patent filings per year

Chart showing SPRAGUE SAFETY CONTROL AND SIGs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Transport
#2 Electrical machinery and energy

Top inventors

# Name Total Patents
#1 Sprague Frank J 6
#2 Brewster Charles W 1
#3 Leonard Work 1

Latest patents

Publication Filing date Title
US1742421A Train-control apparatus and circuit arrangement
US1581094A Train-control apparatus
US1553295A Pressure equalizer for air-brake systems
GB149922A Improvements in and relating to train brake systems
US1889724A Method of and apparatus for control of train movements
US1889721A Automatic train control system
US1765355A Automatic train control and signal
GB191518213A Improvements in or relating to Train Brake Systems.
GB104176A Improvements in or relating to Detectors or Relays.
GB101348A Improvements in or relating to Automatic Airbrake Systems.
US1780148A Method of and apparatus for control of train movements
CA197562A Recorder