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For the Inventor, By the Inventor

Romanshorn, Switzerland

Dupro Ag

USPTO Granted Patents = 26

% Expired Patents = 15.4

Forward Citations = 368

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9 inventors (with patents filed for the assignee):

goldMedal Peter Worwag (14 out of 28 patents)

silverMedal Siegfried Maier (5 out of 5 patents)

bronzeMedal 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)


Core Competencies:
Vacuum Cleaner
Cleaning Tool
Suction Nozzle
Brush Roller
Turbobrush
Air Turbine
Central Dust-Collecting
Adjustment Mechanism
Cleaning Apparatus
Multi-Purpose Nozzle
Friction Drive Unit
Speed Control Circuit

26 patents:

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),
Company Overview
Dupro Ag is a Swiss company based in Romanshorn, specializing in advanced agricultural technology solutions. The organization focuses on developing innovative systems and equipment designed to enhance efficiency and sustainability in farming practices. With a commitment to research and development, Dupro Ag aims to address modern agricultural challenges through cutting-edge technology, promoting better crop management and resource utilization. Their expertise spans various domains within the agricultural sector, contributing to the evolution of smart farming techniques.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

26 Patents

#2 in Romanshorn

#503 in Switzerland

#24,826 in the World

Romanshorn, CH
Romanshorn, Switzerland

Dupro Ag

Forward Citations = 368

9 inventors:

goldMedal Peter Worwag (14 out of 28 patents)

silverMedal Siegfried Maier (5 out of 5 patents)

bronzeMedal Jurgen Jonischus (2 out of 4 patents)

4.  Eckart Albrecht (2 out of 2 patents)

5.  Peter Wörwag (1 out of 2 patents)

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