Issued Patents All Time
Showing 25 most recent of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8141231 | Electric motor | Melvin E. Wolfe, Jr., Alan R. Ayotte | 2012-03-27 |
| 8015661 | Vacuum with rechargeable battery | Li H. Liu, Jonathan Miller | 2011-09-13 |
| 7859224 | Charge control circuit for a vehicle vacuum cleaner battery | James M. Robitaille, Neil N. Norell | 2010-12-28 |
| 7654480 | Mulcher | Jason Gottschall, Robert L. Crevling, Jr., Randy L. Buss | 2010-02-02 |
| 7345437 | Rechargeable vacuum with reduced AC voltage | Kevin L. Beckstead | 2008-03-18 |
| 7342339 | Reluctance machine having a non-uniform air gap | Neil N. Norell | 2008-03-11 |
| 7337494 | Electrostatic cloth attachment for vacuum head | Robert L. Crevling, Jr., Cory F. Girton | 2008-03-04 |
| 7241117 | Motor shaft assembly and method | Melvin E. Wolfe, Jr. | 2007-07-10 |
| 7208907 | System and method of restarting a switched reluctance motor after a rapid cycling of power | Neil N. Norell, James M. Robitaille | 2007-04-24 |
| 7095150 | Apparatus for securing a bobbin of a reluctance machine | Neil N. Norell | 2006-08-22 |
| 6637068 | Float rod seal for vacuum cleaner | Robert L. Crevling, Jr. | 2003-10-28 |
| 6539605 | Method of making a support structure | Gary C. Berray | 2003-04-01 |
| 6384497 | Thermally responsive protection apparatus for electric motors | Gary C. Berray | 2002-05-07 |
| 6381803 | Vacuum cleaner | Robert C. Berfield, Ronald Griffin | 2002-05-07 |
| 6343773 | Support structure | Gary C. Berray | 2002-02-05 |
| 6222285 | Intelligent switch control circuit | Edward M. Haley, James M. Robitaille, Robert L. Crevling, Jr. | 2001-04-24 |
| 6184601 | Thermally responsive protection apparatus | Gary C. Berray, James Frank Streeter | 2001-02-06 |
| 6091176 | Motor shaft assembly | Melvin E. Wolfe, Jr., James Frank Streeter | 2000-07-18 |
| 6077032 | Housing assembly for a vacuum cleaner | Melvin E. Wolfe, Jr. | 2000-06-20 |
| 6069432 | Rotor structure | Neil N. Norell | 2000-05-30 |
| 6035515 | Motor shaft assembly and method | Melvin E. Wolfe, Jr. | 2000-03-14 |
| 5943776 | Motor shaft assembly method | Melvin E. Wolfe, Jr., James Frank Streeter | 1999-08-31 |
| 5747973 | Current regulating switch circuit | James M. Robitaille, Robert L. Crevling, Jr. | 1998-05-05 |
| 5459444 | Circuit breaker for use in wall mounted plug | L. Lent Crevling, James M. Robitaille | 1995-10-17 |
| 5373210 | Motor brush spring subassembly | R. Lent Crevling, Jr., Melvin E. Wolfe, Jr. | 1994-12-13 |