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WELCH WILLIAM HENRY ISAAC

Overview
  • Total Patents
    17
About

WELCH WILLIAM HENRY ISAAC has a total of 17 patent applications. Its first patent ever was published in 1897. It filed its patents most often in United Kingdom. Its main competitors in its focus markets transport and electrical machinery and energy are UNIPART RAIL LTD, CHICAGO RAILWAY SIGNAL AND SUP and COMPAGNIE DE SIGNAUX ELECTRIQUES POUR CHEMINS DE F.

Patent filings in countries

World map showing WELCH WILLIAM HENRY ISAACs patent filings in countries
# Country Total Patents
#1 United Kingdom 17

Patent filings per year

Chart showing WELCH WILLIAM HENRY ISAACs patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Welch William Henry Isaac 17

Latest patents

Publication Filing date Title
GB103888A Improvements in or relating to Railway Signals.
GB191108981A Improvements in and relating to Electrical Indicators for Railway Signal Lamps.
GB191002832A Improvements in or relating to Reflectors and Bowl Rings for Incandescent Gas Lamps.
GB190725467A Improvements in Railway Hand Signalling Lamps.
GB190628696A Improvements in Oil Lamp Burners.
GB190601755A Improvements in Burners for Oil Lamps
GB190601754A An Improvement in Lamp Wicks
GB190525112A Improvements in Incandescence Gas Lamps, particularly applicable to Railway Carriage Roof, or similar, Lamps.
GB190427200A Improvements in Railway Signal or other Lamps.
GB190413085A Improvements in Oil Lamps for Railway Signals and other purposes and Oil Burners therefor
GB190325384A Improvements in Overhead Regenerative Gas Lamps
GB190209867A Improvements in Head and other Exposed Lamps.
GB190017547A A Combined Book Mark and Paper Cutter.
GB190017546A An Improvement in External Shop Lanterns.
GB190016626A Improvements in Overhead Regenerative Gas Lamps.
GB189815343A An Improvement in Semaphore Signals for Railways.
GB189711117A An Improvement in Overhead Gas Lamps for Railway Carriages and like situations.