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Dupro Ag

USPTO Granted Patents = 26

Forward Citations = 361

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9 inventors (with patents filed for the assignee):

Peter Worwag (14 out of 28 patents)

Siegfried Maier (5 out of 5 patents)

Jurgen Jonischus (2 out of 4 patents)

4. Eckart Albrecht (2 out of 2 patents)

5. Peter Wörwag (1 out of 2 patents)

6. Edgar Melzner (1 out of 1 patent)

7. Niklaus Hug (1 out of 7 patents)

8. Peter Woerwag (1 out of 2 patents)

9. Nikolaus Hug (1 out of 1 patent)

26 patents: Sort by Forward Citations

1. 7941893 - Vacuum cleaning tool and method for its operation (2011-05-17),

2. 7316050 - Vacuum cleaning tool having an exchangeable attachment (2008-01-08),

3. 7246410 - Vacuum cleaning tool having an air turbine with stabilizing air stream (2007-07-24),

4. 7246408 - Cleaning tool with rotatably driven working tool (2007-07-24),

5. 6151752 - Vacuum cleaner head (2000-11-28),

6. 6134745 - Vacuum cleaning tool having a brush roller that can be pivoted out (2000-10-24),

7. D427398 - Vacuum turbobrush (2000-06-27),

8. D424260 - Manual turbobrush (2000-05-02),

9. 5950275 - Vacuum cleaning tool for a vacuum cleaning apparatus (1999-09-14),

10. 5039133 - Suction nozzle coupling having rotatably mounted therein a connector for (1991-08-13),

11. 5035154 - Adjustment mechanism for a friction drive unit (1991-07-30),

12. 5014386 - Suction nozzle, with a brush, for a vacuum cleaner (1991-05-14),

13. 5008973 - Multi-purpose suction nozzle (1991-04-23),

14. D312904 - Vacuum cleaner nozzle (1990-12-11),

15. D306789 - Brush-type suction nozzle (1990-03-20),

Dupro Ag is a leading agricultural machinery manufacturer, specializing in innovative solutions for farmers worldwide. With over 20 years of experience, we provide high-quality products such as seeders, tillers, and fertilizers to help maximize crop yields and efficiency. Our commitment to research and development ensures that our equipment is at the forefront of technological advancements in the industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

26 Patents

#29 in

#475 in Switzerland

#24,067 in the World

Dupro Ag

Forward Citations = 361

9 inventors:

Peter Worwag (14 out of 28 patents)

Siegfried Maier (5 out of 5 patents)

Jurgen Jonischus (2 out of 4 patents)

4. Eckart Albrecht (2 out of 2 patents)

5. Peter Wörwag (1 out of 2 patents)

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