Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D316921 | Vacuum cleaner brush | Richard B. Kosten, Bryan de Blois | 1991-05-14 |
| D315622 | Combined hand-held portable vacuum cleaner and brush attachment | Bryan P. deBlois, Richard B. Kosten | 1991-03-19 |
| 4951348 | Rotatable indexable accessory vacuum cleaner tool | Charles Z. Krasznai, Richard B. Kosten, Ron Barker | 1990-08-28 |
| 4947514 | Internal contact for a charging circuit | Michael E. Bitzel, Robert Kubicko, Charles Z. Krasznai | 1990-08-14 |
| 4942641 | Accessory brush attachment | Richard B. Kosten | 1990-07-24 |
| 4928346 | Hand-held vacuum cleaner with power brush | Donald E. Elson, Michael E. Bitzel, Bruce A. Wilder, Stanley J. Rodowsky, Jr., William R. Lessig, III +2 more | 1990-05-29 |
| 4920606 | Electrical power circuit for a vacuum cleaner | Michael E. Bitzel, Robert Kubicko, Charles Z. Krasznai | 1990-05-01 |
| 4841594 | Cordless vacuum cleaner with power brush | Donald E. Elson, Michael E. Bitzel, Bruce A. Wilder, Stanley J. Rodowsky, Jr., William R. Lessig, III +2 more | 1989-06-27 |