Inventor · disambiguated record
Wolfgang Zahn
Also filed as: BIEDERMANN ERNST · WEBER KLAUS · ZAHN WOLFGANG
57 granted patents·1 pending application·706 citations·filing 1974–2006
99Inventor score
Top patents by PatentIndex Score
58 records- 0197US4080061AApparatus for processing developed photographic films prior to copyingAGFA GEVAERT AG·Filed 1976·Granted Mar 21, 1978·46 cites·18 claims
- 0294US4152068AMethod and apparatus for evaluating developed photographic films prior to copyingAGFA GEVAERT AG·Filed 1976·Granted May 1, 1979·30 cites·31 claims
- 0394US4101217AAutomatic color printing apparatusAGFA GEVAERT AG·Filed 1976·Granted Jul 18, 1978·27 cites·21 claims
- 0493US4039258AMethod and apparatus for making reproductions of photograhic copy negatives or the likeAGFA GEVAERT AG·Filed 1976·Granted Aug 2, 1977·26 cites·26 claims
- 0591US4464045AMethod of and an arrangement for calibrating a color copying apparatusAGFA GEVAERT AG·Filed 1982·Granted Aug 7, 1984·28 cites·27 claims
- 0690US4218032AApparatus for convoluting webs onto rotary coresAGFA GEVAERT AG·Filed 1979·Granted Aug 19, 1980·25 cites·30 claims
- 0788US5781276APrinting of color filmAGFA GEVAERT AG·Filed 1997·Granted Jul 14, 1998·17 cites·21 claims
- 0883US3946507ALabel for use on containers for photographic film or the likeAGFA GEVAERT AG·Filed 1974·Granted Mar 30, 1976·28 cites·8 claims
- 0982US4099862AMethod and apparatus for evaluating developed photographic films preparatory to reproductionAGFA GEVAERT AG·Filed 1976·Granted Jul 11, 1978·13 cites·23 claims
- 1082US4046614ASplicing apparatus for photographic films or the likeAGFA GEVAERT AG·Filed 1976·Granted Sep 6, 1977·15 cites·14 claims
- 1181US4461832APreparation of an enzymatically active formulation embedded in silica gelBASF AG·Filed 1982·Granted Jul 24, 1984·38 cites·11 claims
- 1281US4128330AEvaluation and copying of originals arranged in a stripAGFA GEVAERT AG·Filed 1976·Granted Dec 5, 1978·12 cites·11 claims
- 1379US5467165AMasking of photographs for reproductionAGFA GEVAERT AG·Filed 1993·Granted Nov 14, 1995·10 cites·15 claims
- 1479US4647187APhotographic copierAGFA GEVAERT AG·Filed 1985·Granted Mar 3, 1987·17 cites·18 claims
- 1579US4192605AMethod and apparatus for making color printsAGFA GEVAERT AG·Filed 1978·Granted Mar 11, 1980·11 cites·13 claims
- 1676US4214834APhotographic copying machineAGFA GEVAERT AG·Filed 1979·Granted Jul 29, 1980·9 cites·7 claims
- 1774US5253011ACopying method and copier for filmAGFA GEVAERT AG·Filed 1992·Granted Oct 12, 1993·16 cites·28 claims
- 1870US5155524APhotographic copier with masking device and copying methodAGFA GEVAERT AG·Filed 1992·Granted Oct 13, 1992·13 cites·10 claims
- 1969US5726398AAutomotive bumper and muffler combinationAP PARTS MFG·Filed 1997·Granted Mar 10, 1998·32 cites·14 claims
- 2068US5192970AMethod and arrangement for copying filmstripsAGFA GEVAERT AG·Filed 1991·Granted Mar 9, 1993·7 cites·18 claims
- 2167US5638153AMasking of transparencies for copyingAGFA GEVAERT AG·Filed 1995·Granted Jun 10, 1997·10 cites·52 claims
- 2266US4592649APhotographic roller copying apparatusAGFA GEVAERT AG·Filed 1985·Granted Jun 3, 1986·11 cites·12 claims
- 2366US4088404AApparatus for applying markers to webs of photographic material in copying machinesAGFA GEVAERT AG·Filed 1976·Granted May 9, 1978·9 cites·19 claims
- 2465US4566786AMethod of copying color exposuresAGFA GEVAERT AG·Filed 1985·Granted Jan 28, 1986·10 cites·17 claims
- 2564US5613359AMethod and apparatus for reducing hydrocarbon emissions for an internal combustion engineDAIMLER BENZ AG·Filed 1995·Granted Mar 25, 1997·30 cites·12 claims
- 2659US6146626ADefined enzyme mixtures for obtaining cells and treating woundsKNOLL AG·Filed 1996·Granted Nov 14, 2000·23 cites·5 claims
- 2759US4390270APhotographic copierAGFA GEVAERT AG·Filed 1981·Granted Jun 28, 1983·6 cites·13 claims
- 2858US5162190A1,2-naphthoquinone-2-diazide-sulfonic acid amides and photosensitive compositions containing these compoundsHOECHST AG·Filed 1989·Granted Nov 10, 1992·5 cites·21 claims
- 2957US4873546AColor printing method and apparatusAGFA GEVAERT AG·Filed 1988·Granted Oct 10, 1989·18 cites·30 claims
- 3057US4103996AMethod and apparatus for evaluating and processing a strip of originals to be copiedAGFA GEVAERT AG·Filed 1976·Granted Aug 1, 1978·4 cites·12 claims
- 3156US4971887APositive-working photosensitive mixture and recording material of high thermal stability with phenolic novolak of m-cresol and 2,3,6-trialkylphenolHOECHST AG·Filed 1989·Granted Nov 20, 1990·14 cites·14 claims
- 3252US8012664B2Light-sensitive component for use in photoresistsAZ ELECTRONIC MATERIALS USA·Filed 2006·Granted Sep 6, 2011·0 cites·10 claims
- 3352US4575226APhotographic roller copier apparatusAGFA GEVAERT AG·Filed 1985·Granted Mar 11, 1986·6 cites·11 claims
- 3449US6529243B1Method for electronic reduction of the contrast of video images as early as during recordingFiled 1998·Granted Mar 4, 2003·13 cites·22 claims
- 3549US5300133ASoot particle exhaust-gas filterDAIMLER BENZ AG·Filed 1993·Granted Apr 5, 1994·15 cites·2 claims
- 3649US4691562AProcess for determining aging condition of exhaust-gas catalystDAIMLER BENZ AG·Filed 1986·Granted Sep 8, 1987·16 cites·9 claims
- 3747US5798821ACopying of film under different conditionsAGFA GEVAERT AG·Filed 1997·Granted Aug 25, 1998·3 cites·48 claims
- 3846US5877107AMethod for producing a catalytic converterEMITEC EMISSIONSTECHNOLOGIE·Filed 1996·Granted Mar 2, 1999·13 cites·12 claims
- 3946US4169672AMethod and apparatus for photoelectrophoretic-color-process copyingAGFA GEVAERT AG·Filed 1977·Granted Oct 2, 1979·5 cites·6 claims
- 4045US5821187AProcess and apparatus for recoating a deactivated catalyst coating in a catalystDAIMLER BENZ AG·Filed 1996·Granted Oct 13, 1998·10 cites·1 claims
- 4144US5461458AMethod of automatically controlling exposure when making prints from film from portrait-photography studiosAGFA GEVAERT AG·Filed 1994·Granted Oct 24, 1995·4 cites·8 claims
- 4242US6146817AMethod of and apparatus for masking a master for reproductionAGFA GEVAERT AG·Filed 1995·Granted Nov 14, 2000·2 cites·32 claims
- 4342US5563018A(1,2-naphthoquinone 2-diazide) sulfonic acid esters, radiation-sensitive mixture prepared therewith and radiation-sensitive recording materialHOECHST AG·Filed 1993·Granted Oct 8, 1996·2 cites·15 claims
- 4441US4774171ABis-1,2-naphthoquinone-2-diazide-sulfonic acid amides, their use in a radiation-sensitive mixture, and radiation-sensitive copying materialHOECHST AG·Filed 1987·Granted Sep 27, 1988·5 cites·13 claims
- 4540US5743087AMethod and apparatus for purifying exhaust gases from internal combustion enginesDAIMLER BENZ AG·Filed 1996·Granted Apr 28, 1998·9 cites·4 claims
- 4640US5556604AMethod and apparatus for purifying exhaust gases from internal combustion enginesDAIMLER BENZ AG·Filed 1995·Granted Sep 17, 1996·9 cites·1 claims
- 4740US5223009AExhaust gas equipment for an internal combustion engineDAIMLER BENZ AG·Filed 1992·Granted Jun 29, 1993·13 cites·5 claims
- 4837US6720992B1Method for improving the contrast reproduction of digitized imagesFiled 1999·Granted Apr 13, 2004·6 cites·8 claims
- 4935US6169599B1Method for determining the amount of light in each primary color when copying a colored originalAGFA GEVAERT AG·Filed 1993·Granted Jan 2, 2001·2 cites·3 claims
- 5034US5306595AComposition containing naphthoquinone diazide sulfonic acid mixed esters and radiation-sensitive recording material prepared therewithHOECHST AG·Filed 1992·Granted Apr 26, 1994·3 cites·20 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →