Inventor

Werner von Stein

Inventor

Hamburg, DE

Overview

1978–2004

Patent span

Physics

Primary field (CPC G)

Patents· 10 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 them73%

H04NPictorial communication, e.g. television18%

G06TImage data processing or generation, in general9%

PatentTitleYear

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 5,798,821'Copying of film under different conditions'1998 5,081,486'Process for the preparation of photographic color copies from copy masters'1992 5,016,043'Exposure control process and photographic color copying apparatus'1991 4,951,084'Photographic color copying apparatus and exposure control process'1990 4,459,018'Device for singling out non-reproducible copies fed in a photographic printer'1984 4,403,854'Method and apparatus for making color prints in automatic dependence upon the film type involved'1983 4,264,196'Method and apparatus for making color prints in automatic dependence upon the film type involved'1981 4,080,061'Apparatus for processing developed photographic films prior to copying'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1998Patents assigned to AGFA GEVAERT AG (5)· patent assignee history

1978–2004Based in Hamburg, DE· patent location history

1990Patents assigned to CIBA GEIGY CORP (1)· patent assignee history

1991Patents assigned to GRETAG SYSTEMS (1)· patent assignee history

1992Patents assigned to GRETAG SYSTEMS INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
AGFA GEVAERT AG	5	1978–1998
CIBA GEIGY CORP	1	1990
GRETAG SYSTEMS	1	1991
GRETAG SYSTEMS INC	1	1992

Locations

Location	Patents	Span
Hamburg, DE	10	1978–2004