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For the Inventor, By the Inventor

Wettingen, Switzerland

Gretag Imaging Trading Ag

Calculating rank
USPTO Granted Patents = 14

% Expired Patents = 50.0

Forward Citations = 88

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21 inventors (with patents filed for the assignee):

goldMedal Walter Kraft (4 out of 18 patents)

silverMedal Dieter Franzke (2 out of 2 patents)

bronzeMedal Armin Kündig (2 out of 2 patents)

4.  Guido Keller (2 out of 4 patents)

5.  Willy Koch (2 out of 3 patents)

6.  Mathias Lehmann (1 out of 16 patents)

7.  Beat Frick (1 out of 40 patents)

8.  Adrian Kohlbrenner (1 out of 11 patents)

9.  Hansjörg Rotach (1 out of 4 patents)

10.  Peter Zolliker (1 out of 5 patents)

11.  Franco Fracas (1 out of 1 patent)

12.  Eni Scodellaro (1 out of 2 patents)

13.  Stephan Waldner (1 out of 1 patent)

14.  Georg Von Tobel (1 out of 1 patent)

15.  Peter Kobel (1 out of 1 patent)


14 patents:

1. 6954549 - Local digital image property control with masks (2005-10-11),
2. 6783202 - Ink jet image producing device and process for its operation (2004-08-31),
3. 6736478 - Automatic image quality determination (2004-05-18),
4. 6715941 - Device for the wet chemical processing of photographic material (2004-04-06),
5. 6629746 - Reduction of artefacts in reproduced images (2003-10-07),
6. 6626110 - Apparatus for printing on sheet material (2003-09-30),
7. 6606170 - Apparatus for the manufacture of a photographic print (2003-08-12),
8. 6532058 - Photographic scanner with focus control (2003-03-11),
9. 6525754 - Photographic recording device with automatic loading and unloading of a band-shaped medium (2003-02-25),
10. 6498638 - Optimization apparatus for photographic image data (2002-12-24),
11. 6458492 - Mask changing the brightness profile of a photographic copy (2002-10-01),
12. 6392739 - Method for optimizing a copying light profile (2002-05-21),
13. 6353469 - Photographic image acquisition device (2002-03-05),
14. 6251572 - Process for producing prints (2001-06-26),
Company Overview
Gretag Imaging Trading AG, based in Wettingen, Switzerland, specializes in advanced imaging technologies and solutions. The company focuses on the development and manufacturing of high-quality imaging systems, catering to various sectors including professional photography and graphic arts. With a commitment to innovation, Gretag Imaging integrates cutting-edge technology to enhance image quality and processing, positioning itself as a key player in the imaging industry. Its expertise extends to color management and digital imaging workflows, serving clients globally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

14 Patents

#1 in Wettingen

#841 in Switzerland

#42,312 in the World

Wettingen, CH
Wettingen, Switzerland

Gretag Imaging Trading Ag

Forward Citations = 88

21 inventors:

goldMedal Walter Kraft (4 out of 18 patents)

silverMedal Dieter Franzke (2 out of 2 patents)

bronzeMedal Armin Kündig (2 out of 2 patents)

4.  Guido Keller (2 out of 4 patents)

5.  Willy Koch (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gretag Imaging Trading Ag. Retrieved from https://idiyas.com/company/gretag-imaging-trading-ag

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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