Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6082083 | Ground speed control system | Philip G. Stalpes, Larry W. Schmidt, Henry B. Tillotson, Nathan J. Friberg | 2000-07-04 |
| 5615542 | Mulching blade for lawn mower | Nathan J. Friberg | 1997-04-01 |
| 5363635 | Mulching mower with improved mulching blade | Donald M. White, III, Gregory P. Tonsager | 1994-11-15 |
| 5315771 | Discharge chute assembly for snowthrower | Donald M. White, III, Thomas K. Bricko | 1994-05-31 |
| 5195307 | Simplified blade brake clutch and propulsion control | Nathan J. Friberg | 1993-03-23 |
| 5177888 | Discharge chute assembly for snowthrower | Thomas K. Bricko, John R. Hacker, David E. Larsen, Dean R. Toensing, Donald M. White, III | 1993-01-12 |
| 5133176 | Multi-bladed mulching mower | James R. Baumann, Raymond H. Smith | 1992-07-28 |
| 5090183 | Discharge chute blocking device for a rotary lawn mower | Henry B. Tillotson | 1992-02-25 |
| RE33726 | Single stage snowthrower | Donald M. White, III | 1991-10-29 |
| 5042238 | Riding lawn mower | Donald M. White, III, Henry B. Tillotson | 1991-08-27 |
| 4951449 | Convertible lawn mower | — | 1990-08-28 |
| 4908968 | Snowthrower with resilient impeller | Henry B. Tillotson | 1990-03-20 |
| 4694594 | Single stage snowthrower | Donald M. White, III | 1987-09-22 |
| 4403466 | Lawn mower engine oil drain | Henry B. Tillotson, James R. Baumann | 1983-09-13 |
| 4326370 | Rotary lawn mower | — | 1982-04-27 |
| 4205512 | Rotary mulching mower | — | 1980-06-03 |