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DURST AG

Overview
  • Total Patents
    188
About

DURST AG has a total of 188 patent applications. Its first patent ever was published in 1952. It filed its patents most often in Germany, United States and Italy. Its main competitors in its focus markets optics, measurement and electrical machinery and energy are OEDOEN RISZDORFER DR, MEOPTA PREROV NARODNI PODNIK and DURST SPA FABBRICA MACCHINE ED.

Patent filings in countries

World map showing DURST AGs patent filings in countries

Patent filings per year

Chart showing DURST AGs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Barbieri Siegfried 29
#2 Durst Julius 14
#3 Gandini Mario 13
#4 Durst Gilbert 13
#5 Vinatzer Alex 11
#6 Barbieri S 8
#7 Pramstraller W 6
#8 Muehloegger L 5
#9 Pramstraller Wilmuth 5
#10 Barbieri Siegfried Ing Grad 5

Latest patents

Publication Filing date Title
EP0175971A2 Method and apparatus for focusing the picture of an object on an image plane
DE3336052A1 Process and apparatus for developing photographic bases
EP0084636A2 Process and apparatus for determination of the exposure time
EP0046491A2 Method and device for the measurement of light
EP0025849A1 Filter arrangement for a photographic colour enlarging or copying apparatus
DE2942790A1 Light meter with filters and transducer shutter - coordinates filter movement, by integral assembly of disc with contact zones for switching
EP0012174A1 Light measuring apparatus
US4285593A Circuit for the control of exposure time in photographic enlarging equipment
EP0006109A1 Illumination device with a light guiding box for photographic enlargers with a film holder rotatable in its plane
US4191466A Illuminating system for color enlargement or copying equipment
DE2847187A1 Copier combined with projection unit - has daylight viewing facility with option to photocopy viewed picture
EP0001636A1 Exposure device for colour enlarging or copying apparatuses
DE2834147A1 LIGHTING DEVICE FOR A PHOTOGRAPHIC COLOR ENLARGEMENT OR COPIER
DE2751558A1 LIGHTING DEVICE FOR COLOR ENLARGEMENT OR COPY DEVICES
DE2733863A1 MEASURING DEVICE FOR DETERMINING THE COLOR COMPOSITION OF THE COPY LIGHT IN PHOTOGRAPHIC ENLARGEMENT DEVICES
DE2728547A1 LIGHTING DEVICE WITH A LIGHT MIXING CHAMBER, IN PARTICULAR FOR PHOTOGRAPHIC ENLARGEMENT OR COPY DEVICES
DE2701832A1 MEASURING DEVICE FOR DETERMINING THE COLOR COMPOSITION OF THE COPY LIGHT IN PHOTOGRAPHIC ENLARGEMENT DEVICES
US4050815A Photographic enlarging apparatus with hinged image holder
US4087186A Light measuring circuit for a photometer
US4077716A Illuminating equipment for a photographic enlarging or copying apparatus