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ANDREW SMITH HARKNESS LTD

Overview
  • Total Patents
    24
About

ANDREW SMITH HARKNESS LTD has a total of 24 patent applications. Its first patent ever was published in 1953. It filed its patents most often in France, United Kingdom and United States. Its main competitors in its focus markets optics, civil engineering and audio-visual technology are DIACORA GES FUER STEREO BILDTE, CHARLES BESELER COMPANY and PID CORP.

Patent filings in countries

World map showing ANDREW SMITH HARKNESS LTDs patent filings in countries
# Country Total Patents
#1 France 7
#2 United Kingdom 7
#3 United States 3
#4 Germany 2
#5 Denmark 2
#6 Austria 1
#7 Canada 1
#8 Spain 1

Patent filings per year

Chart showing ANDREW SMITH HARKNESS LTDs patent filings per year from 1900 to 2020

Focus technologies

# Technology
#1 Cameras
#2 Swimming pools
#3 Advertising
#4 Shaping of plastics

Top inventors

# Name Total Patents
#1 Harkness Thomas Smith 10
#2 Kolb Otto Kurt 3
#3 Smith Harkness Thomas 3
#4 Kurt Kolb Otto 1
#5 Harkness Thomas S 1

Latest patents

Publication Filing date Title
GB1129925A Improvements in or relating to rear projection screens
GB1042716A Improvements in or relating to the production of composite images
US2944462A Cinematograph screens
US2932581A Cinematograph screens
GB831517A Improvements in cinematograph screens
US2934997A Cinematograph screen having improved properties
GB813920A Improvements in cinematograph screens
GB813847A Improvements in cinematograph screens
GB814004A Improvements in and relating to shelters or like building structures particularly ofthe transportable type
GB746667A Improvements in cinematograph screens
CA580870A Projection screen