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For the Inventor, By the Inventor

Regensdorf, Switzerland

Gretag Aktiengesellschaft


USPTO Granted Patents = 85

Forward Citations = 1,444

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65 inventors (with patents filed for the assignee):

goldMedal Hans Ott (14 out of 24 patents)

silverMedal Kurt Ehrat (9 out of 14 patents)

bronzeMedal Fred Mast (8 out of 10 patents)

4.  Ernst Huber (6 out of 6 patents)

5.  Rene Luscher (6 out of 6 patents)

6.  Markus Berner (5 out of 10 patents)

7.  Rino Ernst Kunz (4 out of 13 patents)

8.  Thomas Senn (3 out of 8 patents)

9.  Fortunat Schrammli (3 out of 3 patents)

10.  Jean A Knus (3 out of 3 patents)

11.  Walter Grossmann (3 out of 3 patents)

12.  Pierre Schmid (3 out of 3 patents)

13.  Walter R Widmer (3 out of 3 patents)

14.  Robert Wahli (3 out of 3 patents)

15.  Bruno Zimmermann (2 out of 4 patents)


Core Competencies:
Halftone Percentage
Photometric Data
Ink Control
Print Quality
Optical Reflection
Densitometer
Laser Processing
Colorimetric Analysis
Image Defects
Speech Processing
Data Encryption
Illuminating Device

85 patents:

1. 6084693 - Process and apparatus for the determination of halftone percentage values (2000-07-04),
2. 5987396 - Computer-controlled device for detecting optical transmission and/or (1999-11-16),
3. 5530563 - Process and apparatus for the determination of halftone percentage values (1996-06-25),
4. 5519210 - Apparatus and a process for recording photometric data that is (1996-05-21),
5. 5426508 - Manual densitometer with manully operated dial (1995-06-20),
6. D357695 - Hand held unit for determining photometric data (1995-04-25),
7. 5267178 - Photometric process and computer controlled photometer (1993-11-30),
8. 5206707 - Apparatus for the analysis of print control fields (1993-04-27),
9. 5113258 - Compensation circuit for the correction of image defects of a television (1992-05-12),
10. 5068810 - Process for the determination of colorimetric differences between two (1991-11-26),
11. 5020106 - Process for the cryptographic processing of data and cryptographic (1991-05-28),
12. 5015088 - Illuminating apparatus for projection purposes (1991-05-14),
13. 4975862 - Process and apparatus for the ink control of a printing machine (1990-12-04),
14. 4969188 - Process and apparatus for the protection of secret elements in a network (1990-11-06),
15. 4968140 - Manual device for the determination or measurement of photometric data (1990-11-06),
Gretag Aktiengesellschaft is a leading technology company specializing in imaging solutions and color management systems. With over 50 years of experience, the company provides innovative products and services for various industries including photography, printing, and graphic design. Gretag's advanced technologies and software solutions enable customers to achieve accurate color reproduction and enhance their visual experiences. Visit their website to learn more about their comprehensive range of imaging solutions.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 29 2026

Gretag Aktiengesellschaft
85 Patents

#1 in Regensdorf

#188 in Switzerland

#8,944 in the World

Regensdorf, CH
Regensdorf, Switzerland

Gretag Aktiengesellschaft

Forward Citations = 1,444

65 inventors:

goldMedal Hans Ott (14 out of 24 patents)

silverMedal Kurt Ehrat (9 out of 14 patents)

bronzeMedal Fred Mast (8 out of 10 patents)

4.  Ernst Huber (6 out of 6 patents)

5.  Rene Luscher (6 out of 6 patents)

Please report any incorrect information to [email protected]
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