Elgin Sweeper Co.
20Patents
0Active
20Granted
32Portfolio score
Filing activity: Sep 8, 1978 → Sep 16, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5839157A | Street sweeper pick-up head | Fixed Constructions | 25 | Expired |
| US4171551A | Spring suspended street sweeper having rear axle spring lockout | Performing Operations; Transporting | 17 | Expired |
| US5060334A | Street sweeper | Performing Operations; Transporting | 17 | Expired |
| US5852847A | High-speed pick-up head for a street sweeper | Fixed Constructions | 16 | Expired |
| US4951347A | Brush-type cleaning system | Fixed Constructions | 16 | Expired |
| USD411498S | Display module | General | 15 | Expired |
| US4807327A | Dirt deflector for cleaning heads | Fixed Constructions | 14 | Expired |
| US4343060A | Hydraulic control system for a street sweeper | Fixed Constructions | 13 | Expired |
| US4236756A | Street sweeper having an elevating hopper with supporting outriggers | Fixed Constructions | 13 | Expired |
| USD400124S | Truck body | General | 12 | Expired |
| US5251652A | Street sweeper | Performing Operations; Transporting | 11 | Expired |
| US4222141A | Street sweeper and main broom suspension | Fixed Constructions | 9 | Expired |
| US4178647A | Four-wheeled sweeper | Fixed Constructions | 9 | Expired |
| USD307203S | Cab for street sweeper | General | 8 | Expired |
| US4460186A | Guide wheel suspension for a three wheel sweeper | Performing Operations; Transporting | 7 | Expired |
| US4802549A | Central rotating terminal for vehicles | Performing Operations; Transporting | 6 | Expired |
| US4756552A | Steering mechanism for vehicle with multiple steering wheels | Performing Operations; Transporting | 4 | Expired |
| US4770681A | Dust separator for gas stream | Performing Operations; Transporting | 3 | Expired |
| US7424767B2 | Street sweeper with litter hose | Fixed Constructions | 2 | Expired |
| USD307960S | Control panel for street sweeper | General | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.