For the Inventor, By the Inventor

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Zug, Switzerland

Hygrama Ag

USPTO Granted Patents = 19

% Expired Patents = 15.8

Forward Citations = 117

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23 inventors (with patents filed for the assignee):

Volker Drittel (3 out of 3 patents)

Peter Rohatschek (2 out of 3 patents)

Günther Strasser (2 out of 2 patents)

4. Josef Vollmer (2 out of 3 patents)

5. Alfredo Hellemann (2 out of 2 patents)

6. Erhard Fritz (2 out of 2 patents)

7. Herbert Frisch (2 out of 9 patents)

8. Bernhard Russ (1 out of 4 patents)

9. Jochen Schaible (1 out of 11 patents)

10. Roland Zengerle (1 out of 15 patents)

11. Herbert Frisch (1 out of 8 patents)

12. Erich Dörfler (1 out of 1 patent)

13. Rainer Teltscher (1 out of 1 patent)

14. Herbert Frisch (1 out of 1 patent)

15. Hannes Wirtl (1 out of 1 patent)

19 patents: Sort by Forward Citations

1. 6959911 - Valve with bendable actuating element (2005-11-01),

2. 6945276 - Valve with unilaterally constrained piezoelectric bending element as actuating device (2005-09-20),

3. 6679162 - Working cylinder, switch valve and pressure-actuated working unit (2004-01-20),

4. 6321636 - Piston rod-less pneumatic cylinder (2001-11-27),

5. 6283010 - Piston rod-less pneumatic cylinder (2001-09-04),

6. 6276257 - Working cylinder, switch valve and pressure-actuated working unit (2001-08-21),

7. 6186175 - Rocker valve with pneumatic pre-control (2001-02-13),

8. 6173744 - Piezoelectric valve (2001-01-16),

9. 6101920 - Pneumatic or hydraulic cylinder with piston position detector mounted in (2000-08-15),

10. 6004383 - Membrane dryer for drying moist air with valved scavenger duct (1999-12-21),

11. 6000676 - Microvalve (1999-12-14),

12. 5924443 - Device for limiting the prestress of a control spring (1999-07-20),

13. 5862828 - Oscillating valve for a double acting operating cylinder (1999-01-26),

14. 5823088 - Pneumatic actuating arrangement (1998-10-20),

15. 5606903 - Rodless pressure cylinder (1997-03-04),

Company Overview

Hygrama Ag is a technology-driven company based in Zug, Switzerland, specializing in innovative solutions for the agricultural sector. The organization focuses on developing advanced systems that enhance crop management and optimize agricultural productivity through precision farming techniques. With a commitment to sustainability, Hygrama Ag integrates cutting-edge research in agronomy and data analytics to support farmers in improving yields while minimizing environmental impact. Its expertise positions it as a key player in the evolving landscape of agricultural technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

19 Patents

#34 in Zug

#645 in Switzerland

#32,693 in the World

Zug, Switzerland

Hygrama Ag

Forward Citations = 117

23 inventors:

Volker Drittel (3 out of 3 patents)

Peter Rohatschek (2 out of 3 patents)

Günther Strasser (2 out of 2 patents)

4. Josef Vollmer (2 out of 3 patents)

5. Alfredo Hellemann (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hygrama Ag. Retrieved from https://idiyas.com/company/hygrama-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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