Assignee
DURST AG
IT·20 granted patents·124 citations·filing 1974–1979
Top patents by PatentIndex Score
20 records- 0187US4099194ADevice for the wet processing of photosensitive materialsDURST AG·Filed 1976·Granted Jul 4, 1978·23 cites·6 claims
- 0284US4143966AIllumination device for photographic color apparatusDURST AG·Filed 1978·Granted Mar 13, 1979·14 cites·15 claims
- 0383US4191466AIlluminating system for color enlargement or copying equipmentDURST AG·Filed 1978·Granted Mar 4, 1980·13 cites·12 claims
- 0478US4050807AProcess and device for copying photographic color imagesDURST AG·Filed 1976·Granted Sep 27, 1977·12 cites·12 claims
- 0576US4030833AColor filter determining apparatusDURST AG·Filed 1975·Granted Jun 21, 1977·11 cites·14 claims
- 0672US3984185AProcess and apparatus for filter value and exposure time determination in photographic color printing and enlargingDURST AG·Filed 1974·Granted Oct 5, 1976·9 cites·28 claims
- 0764US4077716AIlluminating equipment for a photographic enlarging or copying apparatusDURST AG·Filed 1976·Granted Mar 7, 1978·6 cites·11 claims
- 0860US4227804AIlluminating apparatus with a light control channel for photographic enlarging equipment with a rotatable picture stage in the plane of the negative to be copiedDURST AG·Filed 1979·Granted Oct 14, 1980·7 cites·15 claims
- 0953US4189227AIlluminating system for photographic color enlargement or copyingDURST AG·Filed 1978·Granted Feb 19, 1980·4 cites·8 claims
- 1051US4320976ALight measuring apparatus incorporating means for shielding light sensor for predetermined minimum timeDURST AG·Filed 1979·Granted Mar 23, 1982·3 cites·12 claims
- 1150US4131362ALight-mixing compartment for a light projectorDURST AG·Filed 1977·Granted Dec 26, 1978·3 cites·6 claims
- 1248US4285593ACircuit for the control of exposure time in photographic enlarging equipmentDURST AG·Filed 1979·Granted Aug 25, 1981·3 cites·12 claims
- 1347US4188125AApparatus for the determination of the color composition of the printing light in a photographic enlargerDURST AG·Filed 1977·Granted Feb 12, 1980·4 cites·12 claims
- 1444US4053222AIlluminating apparatus for photographic color enlargerDURST AG·Filed 1976·Granted Oct 11, 1977·2 cites·7 claims
- 1544US4050813ALamp-adjusting mechanism, particularly for photographic enlarging apparatusDURST AG·Filed 1976·Granted Sep 27, 1977·4 cites·7 claims
- 1642US3985450AColor filter determining apparatus with indication of the color components to be balancedDURST AG·Filed 1975·Granted Oct 12, 1976·2 cites·10 claims
- 1732US3984676ALight-measuring apparatus with lamp indicator for determining balance of a measuring bridgeDURST AG·Filed 1974·Granted Oct 5, 1976·2 cites·5 claims
- 1828US4165175AApparatus for sampling printing light in a photographic enlarger for determining its color compositionDURST AG·Filed 1977·Granted Aug 21, 1979·0 cites·24 claims
- 1928US4087186ALight measuring circuit for a photometerDURST AG·Filed 1976·Granted May 2, 1978·2 cites·10 claims
- 2023US4050815APhotographic enlarging apparatus with hinged image holderDURST AG·Filed 1976·Granted Sep 27, 1977·0 cites·6 claims
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