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For the Inventor, By the Inventor

Bothell, WA, United States of America

Gretag Systems, Inc.


USPTO Granted Patents = 14

Forward Citations = 62

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19 inventors (with patents filed for the assignee):

goldMedal Walter Kraft (6 out of 18 patents)

silverMedal Beat Frick (3 out of 40 patents)

bronzeMedal Werner R Von Stein (2 out of 3 patents)

4.  Rolf Bronnimann (2 out of 2 patents)

5.  Heiner Schaub (1 out of 3 patents)

6.  Karl Ursprung (1 out of 2 patents)

7.  Kenneth G Hammerquist (1 out of 2 patents)

8.  Maxwell G Maginness (1 out of 5 patents)

9.  Gordon L Overbye (1 out of 1 patent)

10.  Jurgen Nehring (1 out of 8 patents)

11.  Richard A Dolf (1 out of 2 patents)

12.  Christa Strobel (1 out of 1 patent)

13.  Harald Maxeiner (1 out of 1 patent)

14.  Roman Rosenberg (1 out of 1 patent)

15.  Roberto Rupp (1 out of 1 patent)


14 patents:

1. 5284305 - Cassette for winding up photographic strip material (1994-02-08),
2. 5237359 - Storage for strip material (1993-08-17),
3. 5187520 - Photographic copying apparatus (1993-02-16),
4. 5164765 - Exposure control process and photographic copying apparatus (1992-11-17),
5. 5119125 - Process for the preparation of photographic color copies (1992-06-02),
6. 5115270 - Photographic color copying apparatus and exposure control process (1992-05-19),
7. 5109251 - Photographic color copying apparatus (1992-04-28),
8. 5087937 - Photoelectric scanner (1992-02-11),
9. 5081486 - Process for the preparation of photographic color copies from copy (1992-01-14),
10. 5072639 - Method and apparatus for removing wastepaper from a continuous web of (1991-12-17),
11. 5041869 - Photoelectric scanner (1991-08-20),
12. 5036351 - Exposure control process and photographic color copying apparatus (1991-07-30),
13. 5016043 - Exposure control process and photographic color copying apparatus (1991-05-14),
14. 4975723 - Paper-processing control apparatus (1990-12-04),
Company Overview
Gretag Systems, Inc. is a technology company based in Bothell, Washington, specializing in advanced imaging solutions and color management systems. The organization focuses on developing innovative products that enhance the quality and accuracy of color reproduction across various industries, including printing, photography, and digital media. With a commitment to research and development, Gretag Systems aims to provide cutting-edge technologies that meet the evolving needs of its clients in a competitive marketplace.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#38 in Bothell, WA

#483 in Washington

#22,302 in US

#42,199 in the World

Bothell, WA (US)
Bothell, WA, United States of America

Gretag Systems, Inc.

Forward Citations = 62

19 inventors:

goldMedal Walter Kraft (6 out of 18 patents)

silverMedal Beat Frick (3 out of 40 patents)

bronzeMedal Werner R Von Stein (2 out of 3 patents)

4.  Rolf Bronnimann (2 out of 2 patents)

5.  Heiner Schaub (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gretag Systems, Inc.. Retrieved from https://idiyas.com/company/gretag-systems

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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