Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800312 | Mounting for brushes of electric motors | R. Lent Crevling, Jr. | 1989-01-24 |
| 4782261 | Connection of motor brush holder to stator coil | R. Lent Crevling, Jr. | 1988-11-01 |
| 4623366 | Grid element for lid of a cannister type vacuum cleaner | Robert C. Berfield, Craig A. Seasholtz | 1986-11-18 |
| 4538971 | Assembly of tank lid and fan means of a wet/dry vacuum | Jonathan Miller, Robert C. Berfield, Ronald F. Meland, Robert L. Crevling, Jr., Lonnie B. Lawson, Jr. | 1985-09-03 |
| D276948 | Dolly for a tank, barrel, or the like | Robert C. Berfield, Ronald F. Meland | 1984-12-25 |
| D276279 | Electric vacuum cleaner | Jonathan Miller, Robert C. Berfield | 1984-11-06 |
| 4334337 | Compact wet-dry electric vacuum cleaner | Jonathan Miller, Richard M. Fegan, Robert C. Berfield, Kenneth R. Hiester | 1982-06-15 |
| 4330899 | Noise reducing blower motor housing means for vacuum cleaner, or the like | Jonathan Miller, Richard M. Fegan, Robert C. Berfield, Kenneth R. Hiester | 1982-05-25 |