Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6698172 | Lawn mower suspension assembly | David A. Ferris, Todd Gordon | 2004-03-02 |
| 6510678 | Load compensation adjustment in lawnmower having independent suspension | David A. Ferris, William Shea | 2003-01-28 |
| 6460318 | Lawn mower independent suspension | David A. Ferris, Todd Gordon | 2002-10-08 |
| 6244025 | Load compensation adjustment in lawnmower having independent suspension | David A. Ferris, William Shea | 2001-06-12 |
| 5915880 | Drainage apparatus | — | 1999-06-29 |
| 5746037 | Concrete block containing disposable tire sections | — | 1998-05-05 |
| 5347919 | Tractive tire compactor | — | 1994-09-20 |
| 5279216 | Tire compactor and method | — | 1994-01-18 |
| 5271321 | Tire compacting machine | — | 1993-12-21 |
| 5214897 | Concrete block | — | 1993-06-01 |
| 5158188 | Portable apparatus for moving a patient about a room | — | 1992-10-27 |
| 5152214 | Tire compacting machine | — | 1992-10-06 |
| 5121680 | Tire compactor and method | — | 1992-06-16 |
| 5103616 | Method and container for encapsulating tires | — | 1992-04-14 |