Allis-Chalmers Corporation
532Patents
0Active
532Granted
45Portfolio score
Filing activity: Sep 13, 1973 → May 19, 1986
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4360852A | Overcurrent and overtemperature protective circuit for power transistor system | Electricity | 95 | Expired |
| US4004700A | Hopper gate for self-unloading ships | Performing Operations; Transporting | 94 | Expired |
| US4430952A | Planter gauge wheels with adjustable equalizer mechanism | Emerging Cross-Sectional Technologies | 92 | Expired |
| US3967173A | Transistor bridge inverter motor drive having reduced harmonics | Electricity | 89 | Expired |
| US4173259A | Rear drive assembly with load sensing | Human Necessities | 78 | Expired |
| USD275199S | Tractor cab | General | 77 | Expired |
| US4394147A | Internally supported filter | Performing Operations; Transporting | 58 | Expired |
| US4136508A | Closed-loop combine header height control | Emerging Cross-Sectional Technologies | 55 | Expired |
| US3943392A | Combination slot liner and retainer for dynamoelectric machine conductor bars | Emerging Cross-Sectional Technologies | 54 | Expired |
| US3999643A | Electrical interlock safety control to prevent operation of mower during reverse travel | Mechanical Engineering; Lighting; Heating | 54 | Expired |
| US4047638A | Seed disc for an air planter | Emerging Cross-Sectional Technologies | 53 | Expired |
| US3938400A | Single lever forward-reverse control | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US4441307A | Harvester header with floating cutter bar | Human Necessities | 46 | Expired |
| US4074830A | Compressed air seed planter | Human Necessities | 43 | Expired |
| US4458471A | Combine speed control | Emerging Cross-Sectional Technologies | 42 | Expired |
| US3971972A | Transistor inverter motor drive having voltage boost at low speeds | Electricity | 42 | Expired |
| US3974717A | Four pinion differential | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US3945353A | Two phase nozzle cooling system | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US4359123A | Adjustable power steering mechanism | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4502270A | Crop divider with illuminated points | Human Necessities | 37 | Expired |
| US3935866A | Grain loss monitor | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4505612A | Air admission apparatus for water control gate | Fixed Constructions | 35 | Expired |
| US4441513A | Tailings monitor for combine harvester | Human Necessities | 34 | Expired |
| US4557740A | Weather louver | Performing Operations; Transporting | 34 | Expired |
| US4311204A | Motor vehicle with resilient cushions between its body and main frame structures | Performing Operations; Transporting | 34 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.