For the Inventor, By the Inventor

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Regensdorf, Switzerland

Gretag Aktiengesellschaft

USPTO Granted Patents = 85

Forward Citations = 1,438

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65 inventors (with patents filed for the assignee):

Hans Ott (14 out of 24 patents)

Kurt Ehrat (9 out of 14 patents)

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 Values

Optical Transmission Detection

Photometric Data Analysis

Ink Control in Printing

Colorimetric Differences

Laser Processing Apparatus

Print Quality Evaluation

Densitometer Technology

Optical Image Amplification

Photographic Copying Apparatus

Cryptographic Data Processing

Measurement of Optical Reflection

85 patents: Sort by Forward Citations

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 - Dec 2 2025

85 Patents

#1 in Regensdorf

#179 in Switzerland

#8,656 in the World

Regensdorf, Switzerland

Gretag Aktiengesellschaft

Forward Citations = 1,438

65 inventors:

Hans Ott (14 out of 24 patents)

Kurt Ehrat (9 out of 14 patents)

Fred Mast (8 out of 10 patents)

4. Ernst Huber (6 out of 6 patents)

5. Rene Luscher (6 out of 6 patents)

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