Issued Patents 2004
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 6687951 | Toroidal vortex bagless vacuum cleaner | David Reinfeld | 2004-02-10 |
| 6689225 | Toroidal vortex vacuum cleaner with alternative collection apparatus | — | 2004-02-10 |