Assignee
DURST PHOTOTECHNIK GMBH
IT·9 granted patents·53 citations·filing 1985–1993
Top patents by PatentIndex Score
9 records- 0157US4922276AContinuous processing machine for photographic sheet materialDURST PHOTOTECHNIK GMBH·Filed 1989·Granted May 1, 1990·23 cites·13 claims
- 0255US4961087ADiaphragm adjusting arrangement in a photographic enlarging or copying apparatus having several lenses with an adjustable diaphragmDURST PHOTOTECHNIK GMBH·Filed 1989·Granted Oct 2, 1990·7 cites·8 claims
- 0344US5128710AInstrument for the point-by-point measuring of color originals to be copiedDURST PHOTOTECHNIK GMBH·Filed 1989·Granted Jul 7, 1992·5 cites·6 claims
- 0437US4920378AMethod and a measuring apparatus for determining the exposure time in photographic copyingDURST PHOTOTECHNIK GMBH·Filed 1988·Granted Apr 24, 1990·3 cites·9 claims
- 0535US5365306AMethod and apparatus for regulation of the amount of printing light in photographic enlarging or printing devicesDURST PHOTOTECHNIK GMBH·Filed 1993·Granted Nov 15, 1994·3 cites·16 claims
- 0630US4806988AProcess and an arrangement for the automatic focusing in a photographic enlarging or copying apparatus with a variable enlarging scaleDURST PHOTOTECHNIK GMBH·Filed 1987·Granted Feb 21, 1989·4 cites·17 claims
- 0727US4682883APhotographic color enlarging or copying apparatusDURST PHOTOTECHNIK GMBH·Filed 1985·Granted Jul 28, 1987·2 cites·8 claims
- 0827US4678319AMeasuring device for selecting the filter in photographic enlarging or copying apparatusesDURST PHOTOTECHNIK GMBH·Filed 1985·Granted Jul 7, 1987·4 cites·5 claims
- 0926US4728992AProcess and a device for adjusting a photographic color enlarging or copying apparatusDURST PHOTOTECHNIK GMBH·Filed 1985·Granted Mar 1, 1988·2 cites·14 claims
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