Inventor

Wolfgang Zahn

Inventor

Munich, DE

Overview

1976–2011

Patent span

Physics

Primary field (CPC G)

Patents· 57 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Bprimary

G03BApparatus or arrangements for taking photographs or for projecting or viewing them27%

G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices9%

F01NGas-flow silencers or exhaust apparatus for machines or engines in general8%

Y02TClimate change mitigation technologies related to transportation6%

G03CPhotosensitive materials for photographic purposes5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

C07CAcyclic or carbocyclic compounds4%

B01DSeparation3%

B01JChemical or physical processes, e.g. catalysis or colloid chemistry3%

C12NMicroorganisms or enzymes3%

PatentTitleYear

8,012,664'Light-sensitive component for use in photoresists'2011 6,720,992'Method for improving the contrast reproduction of digitized images'2004 6,529,243'Method for electronic reduction of the contrast of video images as early as during recording'2003 6,200,791'Method of purifying thrombin-like protease enzymes obtained from snake venom'2001 6,169,599'Method for determining the amount of light in each primary color when copying a colored original'2001 6,146,626'Defined enzyme mixtures for obtaining cells and treating wounds'2000 6,146,817'Method of and apparatus for masking a master for reproduction'2000 6,099,644'Process and apparatus for recoating a deactivated catalyst coating in a catalyst'2000 5,877,107'Method for producing a catalytic converter'1999 5,863,711'Process for the production of images on paper'1999 5,821,187'Process and apparatus for recoating a deactivated catalyst coating in a catalyst'1998 5,798,821'Copying of film under different conditions'1998 5,781,276'Printing of color film'1998 5,743,087'Method and apparatus for purifying exhaust gases from internal combustion engines'1998 5,726,398'Automotive bumper and muffler combination'1998 5,638,153'Masking of transparencies for copying'1997 5,613,359'Method and apparatus for reducing hydrocarbon emissions for an internal combustion engine'1997 5,563,018'(1,2-naphthoquinone 2-diazide) sulfonic acid esters, radiation-sensitive mixture prepared therewith and radiation-sensitive recording material'1996 5,556,604'Method and apparatus for purifying exhaust gases from internal combustion engines'1996 5,467,165'Masking of photographs for reproduction'1995 5,461,458'Method of automatically controlling exposure when making prints from film from portrait-photography studios'1995 5,413,899'Light-sensitive mixture containing an 0-naphthoquinonediazide-sulfonic acid ester and recording material produced therewith wherein the 0-naphthoquinone diazides are partial esters'1995 5,358,823'Radiation-sensitive composition containing esterification product of (1,2-naphthoquinone-2-diazide)-sulfonic acid with 2,3,4,4\'-tetrahydroxybenzophenone and a di- or tri-hydroxybenzophenone'1994 5,306,595'Composition containing naphthoquinone diazide sulfonic acid mixed esters and radiation-sensitive recording material prepared therewith'1994 5,300,133'Soot particle exhaust-gas filter'1994 5,268,252'Radiation-sensitive ester and process for its preparation'1993 5,253,011'Copying method and copier for film'1993 5,223,009'Exhaust gas equipment for an internal combustion engine'1993 5,192,970'Method and arrangement for copying filmstrips'1993 5,162,190'1,2-naphthoquinone-2-diazide-sulfonic acid amides and photosensitive compositions containing these compounds'1992 5,155,524'Photographic copier with masking device and copying method'1992 4,971,887'Positive-working photosensitive mixture and recording material of high thermal stability with phenolic novolak of m-cresol and 2,3,6-trialkylphenol'1990 4,873,546'Color printing method and apparatus'1989 4,774,171'Bis-1,2-naphthoquinone-2-diazide-sulfonic acid amides, their use in a radiation-sensitive mixture, and radiation-sensitive copying material'1988 4,691,562'Process for determining aging condition of exhaust-gas catalyst'1987 4,647,187'Photographic copier'1987 4,592,649'Photographic roller copying apparatus'1986 4,575,226'Photographic roller copier apparatus'1986 4,566,786'Method of copying color exposures'1986 4,464,045'Method of and an arrangement for calibrating a color copying apparatus'1984 4,461,832'Preparation of an enzymatically active formulation embedded in silica gel'1984 4,459,018'Device for singling out non-reproducible copies fed in a photographic printer'1984 4,390,270'Photographic copier'1983 4,218,032'Apparatus for convoluting webs onto rotary cores'1980 4,214,834'Photographic copying machine'1980 4,192,605'Method and apparatus for making color prints'1980 4,169,672'Method and apparatus for photoelectrophoretic-color-process copying'1979 4,152,068'Method and apparatus for evaluating developed photographic films prior to copying'1979 4,128,330'Evaluation and copying of originals arranged in a strip'1978 4,103,996'Method and apparatus for evaluating and processing a strip of originals to be copied'1978 4,101,217'Automatic color printing apparatus'1978 4,099,862'Method and apparatus for evaluating developed photographic films preparatory to reproduction'1978 4,088,404'Apparatus for applying markers to webs of photographic material in copying machines'1978 4,080,061'Apparatus for processing developed photographic films prior to copying'1978 4,046,614'Splicing apparatus for photographic films or the like'1977 4,039,258'Method and apparatus for making reproductions of photograhic copy negatives or the like'1977 3,946,507'Label for use on containers for photographic film or the like'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2001Patents assigned to AGFA GEVAERT AG (33)· patent assignee history

1976–2003Based in Munich, DE· patent location history

1984–2001Based in Altrip, DE· patent location history

1987–1999Patents assigned to DAIMLER BENZ AG (8)· patent assignee history

1988–1996Patents assigned to HOECHST AG (8)· patent assignee history

1990–2011Based in Eltville, DE· patent location history

1993–2000Based in Ludwigsburg, DE· patent location history

1998Patents assigned to AP PARTS MFG (1)· patent assignee history

2000–2001Patents assigned to KNOLL AG (2)· patent assignee history

2004Based in Mnchen, DE· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AGFA GEVAERT AG	33	1976–2001
DAIMLER BENZ AG	8	1987–1999
HOECHST AG	8	1988–1996
KNOLL AG	2	2000–2001
AP PARTS MFG	1	1998

Locations

Location	Patents	Span
Munich, DE	34	1976–2003
Ludwigsburg, DE	9	1993–2000
Eltville, DE	8	1990–2011
Altrip, DE	3	1984–2001
Mnchen, DE	1	2004