| 5363771 |
Motorized portable system for aiding persons in ascending or descending stairways |
Robert C. Warren, Glenn E. Herz |
1994-11-15 |
| 5269227 |
Motorized portable system and method for aiding persons in ascending or descending stairways |
Robert C. Warren, Glenn E. Herz |
1993-12-14 |
| 4987935 |
BI-directional tree saw |
Sean P. Corcoran, Thomas E. Dixon, Emory D. Hungerford, Mark P. Mallory |
1991-01-29 |
| 4717191 |
Swivel head for grapple |
— |
1988-01-05 |
| 4708575 |
Forklift truck push-pull slipsheet handler for facilitating conversion of truck between slipsheet handling and pallet handling capabilities |
Richard D. Seaberg |
1987-11-24 |
| 4624620 |
Forklift truck push-pull slipsheet handler for facilitating conversion of truck between slipsheet handling and pallet handling capabilities |
Richard D. Seaberg |
1986-11-25 |
| 4482286 |
Forklift truck push-pull slipsheet handler for facilitating conversion of truck between slipsheet handling and pallet handling capabilities |
Richard D. Seaberg |
1984-11-13 |
| 4227850 |
Lift truck load clamp for handling paper rolls |
Harry F. Weinert |
1980-10-14 |
| 4191092 |
Telescopic ram |
— |
1980-03-04 |
| 4191276 |
High-visibility two-stage mast assembly for lift trucks |
Harlan D. Olson |
1980-03-04 |