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DUNCAN JOHN HENRY HILL

Overview
  • Total Patents
    13
About

DUNCAN JOHN HENRY HILL has a total of 13 patent applications. Its first patent ever was published in 1893. It filed its patents most often in United Kingdom, Switzerland and United States. Its main competitors in its focus markets electrical machinery and energy are LAIGLE RENE, BEAL WILLIAM and PLAISSETTY ACHILLE MARIE.

Patent filings in countries

World map showing DUNCAN JOHN HENRY HILLs patent filings in countries
# Country Total Patents
#1 United Kingdom 11
#2 Switzerland 1
#3 United States 1

Patent filings per year

Chart showing DUNCAN JOHN HENRY HILLs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Electrical machinery and energy

Focus technologies

# Technology
#1 Incandescent mantles

Top inventors

# Name Total Patents
#1 Duncan John Henry Hill 12
#2 Gowenlock Frederick 2
#3 Duncan John-Henry-Hill 1
#4 Barnett Harry Theodore 1
#5 Reich Theodor 1

Latest patents

Publication Filing date Title
GB190216591A Improvements in and connected with Photographic Plate Changing Apparatus.
GB190205986A Improvements in Apparatus for Developing and Fixing Photographic Plates
US659515A Incandescent structure suitable for lighting.
GB189904243A Improvements in Incandescence Bodies suitable for Use with Gas and other Burners.
GB189900631A Improvements in and relating to Incandescence Burners and Mantle Supports.
GB189827205A Improvements in and relating to Incandescence Burners and Mantle Supports.
GB189815713A Improvements in the Manufacture of Incandescence Bodies suitable for Use with Gas and other Burners.
GB189707635A Improvements in Apparatus for Making and Exhibiting Kinetoscopic Pictures.
GB189415493A Improvements in Apparatus for Use in the Manufacture of Butter.
GB189413057A Improvements in Apparatus for Making Butter.
GB189313400A Improvements in or relating to Apparatus for Use in the Manufacture of Butter.
GB189311829A Improvements in and relating to Churns.