Issued Patents 1994
Showing 1–2 of 2 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 |