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Wattwil, Switzerland

Optrel Ag

USPTO Granted Patents = 18

% Expired Patents = 33.3

EPO Patents = 2

Trademarks = 1

Forward Citations = 341

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20 inventors (with patents filed for the assignee):

Leo Keller (3 out of 3 patents)

Lukas Steinemann (3 out of 3 patents)

Emil Ackermann (2 out of 3 patents)

4. Rupert Fuerthbauer (2 out of 2 patents)

5. Ramon Hofer-Kraner (1 out of 4 patents)

6. Tobias Gerfin (1 out of 1 patent)

7. Kaspar Cottier (1 out of 1 patent)

8. Ronald Schindele (1 out of 1 patent)

9. Peter Hones (1 out of 1 patent)

10. Rico Sonderegger (1 out of 1 patent)

11. Phillip Syré (1 out of 1 patent)

12. Sven T Lagerwall (1 out of 19 patents)

13. Christoph Lutz (1 out of 1 patent)

14. Francesco Del Bon (1 out of 1 patent)

15. Franco Del Bon (1 out of 13 patents)

18 patents: Sort by Forward Citations

1. 9610198 - Protection device for a welder (2017-04-04),

2. RE45677 - Anti-glare protection device (2015-09-28),

3. 8181270 - Anti-glare protection device (2012-05-22),

4. 7800034 - Dazzle protection unit for a portable dazzle protection device including a light capturing element guiding light to at least one sensor (2010-09-21),

5. 7161116 - Welding protective mask with illumination equipment (2007-01-09),

6. 6941577 - Antiglare device for welding protective masks (2005-09-13),

7. 6891681 - Anti-glare protection device (2005-05-10),

8. 6887531 - Glare protection device (2005-05-03),

9. 6796652 - Glare-protection device with a screened evaluation circuit (2004-09-28),

10. 6675800 - Emergency flight safety device (2004-01-13),

11. 6270223 - Active electro-optical filter device and glare-protection device (2001-08-07),

12. 5793449 - Protective device (1998-08-11),

13. 5571217 - Protective assembly for the protection of the human head (1996-11-05),

14. 5510609 - Electrically controllable optical filter element (1996-04-23),

15. D365666 - Welding helmet (1995-12-26),

Optrel AG is a Swiss company specializing in the development and manufacturing of innovative welding and safety equipment. The company is renowned for its advanced auto-darkening welding helmets and respiratory protection systems, which enhance safety and comfort for professionals in the welding industry. With a strong focus on research and technology, Optrel AG continuously strives to improve user experience and safety standards, positioning itself as a leader in protective gear solutions within the global market.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

18 Patents

#2 in Wattwil

#688 in Switzerland

#34,146 in the World

Wattwil, Switzerland

Optrel Ag

Forward Citations = 341

20 inventors:

Leo Keller (3 out of 3 patents)

Lukas Steinemann (3 out of 3 patents)

Emil Ackermann (2 out of 3 patents)

4. Rupert Fuerthbauer (2 out of 2 patents)

5. Ramon Hofer-Kraner (1 out of 4 patents)

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