Dupro AG
Patent Applications and Registrations
Patent applications and USPTO patent grants for Dupro AG.The latest application filed is for "vacuum cleaning tool and method for its operation".
- Dupro AG - Romanshorn CH
- DUPRO AG - Industriestr. 6 Romanshorn CH
- Dupro AG - CH CH
| Patent | Date |
|---|---|
| Vacuum cleaning tool and method for its operation Grant 7,941,893 - Worwag May 17, 2 | 2011-05-17 |
| Vacuum Cleaning Tool and Method for Its Operation App 20080053479 - Worwag; Peter | 2008-03-06 |
| Vacuum cleaning tool having an exchangeable attachment Grant 7,316,050 - Worwag January 8, 2 | 2008-01-08 |
| Vacuum cleaning tool having an air turbine with stabilizing air stream Grant 7,246,410 - Worwag July 24, 2 | 2007-07-24 |
| Cleaning tool with rotatably driven working tool Grant 7,246,408 - Worwag July 24, 2 | 2007-07-24 |
| Wheel for a Floor Surface App 20070056667 - Worwag; Peter | 2007-03-15 |
| Vacuum Cleaning Tool, Especially Hand-Held Nozzle, for a Vacuum Cleaner App 20060179606 - Worwag; Peter | 2006-08-17 |
| Cleaning Tool for Floor Surfaces Having an Illumination Element for a Working Area App 20050115014 - Worwag, Peter | 2005-06-02 |
| Vacuum cleaning tool with rotating brush roller Grant 6,813,809 - Worwag November 9, 2 | 2004-11-09 |
| Vacuum Cleaning Tool Having An Air Turbine with Stabilizing Air Stream App 20040123417 - Worwag, Peter | 2004-07-01 |
| Vacuum Cleaning Tool Having an Exchangeable Attachment App 20040103496 - Worwag, Peter | 2004-06-03 |
| Cleaning Tool with Rotatably Driven Working Tool App 20040103497 - Worwag, Peter | 2004-06-03 |
| Vacuum cleaning tool with direct flow turbine Grant 6,615,445 - Worwag September 9, 2 | 2003-09-09 |
| Vacuum cleaning tool with exchangeable vacuum shoes Grant 6,550,099 - Worwag April 22, 2 | 2003-04-22 |
| Cleaning device for smooth floor surfaces App 20020124334 - Worwag, Peter | 2002-09-12 |
| Vacuum cleaning tool with rotating brush roller App 20020120999 - Worwag, Peter | 2002-09-05 |
| Vacuum cleaning tool Grant D457,696 - Worwag May 21, 2 | 2002-05-21 |
| Vacuum cleaning tool with direct flow turbine App 20020042967 - Worwag, Peter | 2002-04-18 |
| Vacuum cleaning tool with pear-shaped turbine chamber App 20020042966 - Worwag, Peter | 2002-04-18 |
| Vacuum cleaning tool with an outlet ramp App 20020042968 - Worwag, Peter | 2002-04-18 |
| Vacuum cleaner head Grant 6,151,752 - Melzner , et al. November 28, 2 | 2000-11-28 |
| Vacuum cleaning tool having a brush roller that can be pivoted out Grant 6,134,745 - Worwag October 24, 2 | 2000-10-24 |
| Manual turbobrush Grant D424,260 - Worwag May 2, 2 | 2000-05-02 |
| Suction nozzle coupling having rotatably mounted therein a connector for a suction hose Grant 5,039,133 - Albrecht August 13, 1 | 1991-08-13 |
| Suction nozzle, with a brush, for a vacuum cleaner Grant 5,014,386 - Worwag May 14, 1 | 1991-05-14 |
| Multi-purpose suction nozzle Grant 5,008,973 - Worwag April 23, 1 | 1991-04-23 |
| Brush-type suction nozzle Grant D306,789 - Worwag March 20, 1 | 1990-03-20 |
| Vacuum-cleaning apparatus Grant 4,776,059 - Worwag October 11, 1 | 1988-10-11 |
| Method and apparatus for humidifying and purifying the air of a room Grant 4,749,389 - Worwag June 7, 1 | 1988-06-07 |
| Top portion for a canister-type suction apparatus Grant D283,065 - Maier * March 18, 1 | 1986-03-18 |
| Top portion for a canister-type suction apparatus Grant D283,066 - Maier * March 18, 1 | 1986-03-18 |
| Cleaning apparatus Grant 4,537,424 - Maier , et al. August 27, 1 | 1985-08-27 |
| Suction device for cleaning textile floor coverings Grant 4,517,705 - Hug May 21, 1 | 1985-05-21 |
| Vacuum cleaner Grant D277,325 - Hug January 22, 1 | 1985-01-22 |
| Cleaning implement Grant 4,209,872 - Maier July 1, 1 | 1980-07-01 |
| Cleaning implement Grant 4,173,807 - Maier November 13, 1 | 1979-11-13 |
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