Issued Patents All Time
Showing 25 most recent of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7143468 | Vortex vacuum cleaner nozzle with means to prevent plume formation | David Reinfeld | 2006-12-05 |
| 6960063 | Vortex attractor without a backplate | David Reinfeld | 2005-11-01 |
| 6957472 | Cannister and upright vortex vacuum cleaners | David Reinfeld | 2005-10-25 |
| 6896104 | Flat spool elastic motor having time-averaged constant torque output | — | 2005-05-24 |
| 6881025 | Suction cup vortex attractor | David Reinfeld | 2005-04-19 |
| 6811687 | Vortex pool cleaner | — | 2004-11-02 |
| 6802693 | Vortex attractor with vanes attached to containing ring and backplate | David Reinfeld | 2004-10-12 |
| 6802881 | Rotating wave dust separator | David Reinfeld | 2004-10-12 |
| 6742626 | Elastic motor having time-averaged constant torque output | — | 2004-06-01 |
| 6729839 | Toroidal and compound vortex attractor | David Reinfeld | 2004-05-04 |
| 6719830 | Toroidal vortex vacuum cleaner centrifugal dust separator | David Reinfeld | 2004-04-13 |
| 6689225 | Toroidal vortex vacuum cleaner with alternative collection apparatus | — | 2004-02-10 |
| 6687951 | Toroidal vortex bagless vacuum cleaner | David Reinfeld | 2004-02-10 |
| 6623352 | Vortex air barrier | — | 2003-09-23 |
| 6619922 | Vortex attractor for planar and non-planar surfaces | David Reinfeld | 2003-09-16 |
| 6616094 | Lifting platform | — | 2003-09-09 |
| 6612402 | Elastic motor with constant torque output | — | 2003-09-02 |
| 6595753 | Vortex attractor | David Reinfeld | 2003-07-22 |
| 6565321 | Vortex attractor | David Reinfeld | 2003-05-20 |
| 6543726 | Fluid flow straightening techniques | — | 2003-04-08 |
| 6520449 | Lifting platform with positive horizontal stability | — | 2003-02-18 |
| 6497553 | Vortex attractor | David Reinfeld | 2002-12-24 |
| 6464459 | Lifting platform with energy recovery | — | 2002-10-15 |
| 6388393 | Ballasts for operating light emitting diodes in AC circuits | — | 2002-05-14 |
| 6282111 | Inverter control using current mode slope modulation | — | 2001-08-28 |