Allen Engineering Corp.
84Patents
13Active
84Granted
41Portfolio score
Filing activity: Mar 26, 1979 → Dec 8, 2021 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5288166A | Laser operated automatic grade control system for concrete finishing | Fixed Constructions | 60 | Expired |
| US5328295A | Torsional automatic grade control system for concrete finishing | Fixed Constructions | 56 | Expired |
| US6089787A | Transformable two-person floating screed with automatic grade control | Fixed Constructions | 56 | Expired |
| US5108220A | Light weight, fast steering riding trowel | Fixed Constructions | 52 | Expired |
| US5567075A | Offset screed system and quick connect mounting therefore | Fixed Constructions | 46 | Expired |
| US5352063A | Polymer concrete paving machine | Fixed Constructions | 46 | Expired |
| US4702640A | Rotating tube concrete finisher | Fixed Constructions | 41 | Expired |
| US5480258A | Variable width, twin engine riding trowel | Fixed Constructions | 39 | Expired |
| US5480257A | Concrete riding trowel guard clearance system | Fixed Constructions | 37 | Expired |
| US4466757A | Vibratory screed including a spreading device for leveling and distributing plastic concrete in front of the screed | Fixed Constructions | 34 | Expired |
| US4798494A | Floating vibrational screed | Fixed Constructions | 32 | Expired |
| US6383677B1 | Fuel cell current collector | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4249327A | Fine grader | Fixed Constructions | 32 | Expired |
| US5890833A | Hydraulically controlled riding trowel | Fixed Constructions | 32 | Expired |
| US6019545A | Surface finishing machine with rotatable guard | Fixed Constructions | 31 | Expired |
| US6019433A | Concrete saw with stabilized carriage and blade control | Performing Operations; Transporting | 31 | Expired |
| US6106193A | Hydraulically driven, multiple rotor riding trowel | Fixed Constructions | 30 | Expired |
| US5685667A | High performance contra-rotating riding trowel | Fixed Constructions | 30 | Expired |
| US4375351A | Triangular truss concrete screed having a blade extension bracket | Fixed Constructions | 30 | Expired |
| US5238323A | Riding trowel for concrete finishing | Fixed Constructions | 29 | Expired |
| USD323510S | Riding trowel | General | 29 | Expired |
| US5613801A | High performance twin engine rotor-steered riding trowel | Fixed Constructions | 28 | Expired |
| US4314773A | High density concrete placer | Fixed Constructions | 27 | Expired |
| USD340340S | Riding trowel cranking dolly wheel assembly | General | 27 | Expired |
| US6053660A | Hydraulically controlled twin rotor riding trowel | Fixed Constructions | 23 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.