Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5335740 | Drive system | Robert B. Meyer, John R. Lackner | 1994-08-09 |
| 5285550 | Self-propelled vacuum cleaner having forward and reverse drive | Robert B. Meyer, John R. Lackner | 1994-02-15 |
| 5187832 | Convertible self-proprelled vacuum cleaner | Robert B. Meyer, John R. Lackner | 1993-02-23 |
| 5115537 | Drive system | Robert B. Meyer, John R. Lackner | 1992-05-26 |