Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5335740 | Drive system | John R. Lackner, Hans J. Matuschek | 1994-08-09 |
| 5316097 | Lawn mower | John R. Lackner, Hans J. Matuscheck, Daniel Kennedy | 1994-05-31 |
| 5285550 | Self-propelled vacuum cleaner having forward and reverse drive | John R. Lackner, Hans J. Matuschek | 1994-02-15 |
| 5251711 | Lawn mower | John R. Lackner, Hans J. Matuscheck, Daniel Kennedy | 1993-10-12 |
| 5187832 | Convertible self-proprelled vacuum cleaner | John R. Lackner, Hans J. Matuschek | 1993-02-23 |
| 5115537 | Drive system | John R. Lackner, Hans J. Matuschek | 1992-05-26 |
| 4917475 | Flexoelectric liquid crystal device | Jayantilal S. Patel | 1990-04-17 |
| 4601542 | Nematic liquid crystal storage display device | — | 1986-07-22 |
| 4601543 | Nematic liquid crystal storage display device | Gary D. Boyd, Julian Cheng, Robert N. Thurston | 1986-07-22 |
| 4249281 | Self-propelled vacuum cleaner | Harold W. Schaefer, Richard E. Kronmiller | 1981-02-10 |