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HOUSTON DAVID HENDERSON

Overview
  • Total Patents
    23
About

HOUSTON DAVID HENDERSON has a total of 23 patent applications. Its first patent ever was published in 1895. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets optics are BIOSCOPE IMPROVEMENTS LTD, KNUT SCHAEFER and PAROLINI CESARE.

Patent filings in countries

World map showing HOUSTON DAVID HENDERSONs patent filings in countries
# Country Total Patents
#1 United States 12
#2 United Kingdom 5
#3 Canada 4
#4 Switzerland 1
#5 Spain 1

Patent filings per year

Chart showing HOUSTON DAVID HENDERSONs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics

Focus technologies

# Technology
#1 Cameras

Top inventors

# Name Total Patents
#1 Houston David Henderson 21
#2 Turner Charles Freemont 1
#3 Powlinson Allen L 1
#4 Erb Elias C 1
#5 Houston David-Henderson 1

Latest patents

Publication Filing date Title
CA88292A Road grading machine
GB190208806A Improvements in Panoramic Photographic Cameras.
GB190208807A Improvements in Photographic Roll-holders
GB190206993A Improvements in Daylight Loading Photographic Roll-holders
CA77518A Panoramic photographic camera
US694930A Photographic-roll holder.
CA73310A Stove grate
US694928A Folding roll-holding photographic camera.
US694927A Daylight-loading photographic-roll holder.
US694926A Daylight-loading photographic-roll holder.
GB190105140A Improvements in Panoramic Photographic Cameras.
US694925A Folding roll-holding camera.
US694862A Folding support for cameras.
US670233A Folding panoramic photographic camera.
US670154A Folding panoramic camera.
US673054A Panoramic camera.
US694924A Roll-holding camera.
CA69698A Camera
GB189922676A Improvements in Photographic Cameras.
US694923A Panoramic photographic camera.