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DOUTHITT CORP

Overview
  • Total Patents
    21
About

DOUTHITT CORP has a total of 21 patent applications. Its first patent ever was published in 1938. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets optics are SCHAUT MIKROFILM APP, KAMERA & KINOWERKE DRESDEN VEB and KNUT SCHAEFER.

Patent filings in countries

World map showing DOUTHITT CORPs patent filings in countries

Patent filings per year

Chart showing DOUTHITT CORPs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics

Focus technologies

# Technology
#1 Cameras
#2 Electrography

Top inventors

# Name Total Patents
#1 Maher Robert J 8
#2 Tooson Ronald 7
#3 Hutchins Loren W 4
#4 Loren Hutchins 3
#5 Amolsch William 2
#6 Diehl John G 2
#7 Campbell James T 1
#8 Maher R 1
#9 Diehl Robert J 1
#10 Diehl R 1

Latest patents

Publication Filing date Title
CA2158095A1 Self-contained film exposing/developing machine
US4551016A Vacuum printer
US4464047A Overhead multiple lamp mount console for a vacuum printer
US4484813A Vacuum printer
US3771869A Printing plate maker
US3671124A Microfilm duplicator and method of photocopying microfilms
US3544215A Contact printer assembly
US3545860A Zone control valve for vacuum film holder
US3106145A Contact printing device
US3077824A Step and repeat photographic printer
US3064546A Translucent copyholder photographic printer
US2852977A Color copy camera construction
US2184831A Compensating device for combination negatives
CA571804A Color copy camera construction