Klockner-Humboldt-Deutz AG
431Patents
0Active
431Granted
41Portfolio score
Filing activity: Aug 9, 1972 → Feb 7, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4236492A | Internal combustion engine having a supercharger and means for cooling charged air | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4289611A | Multi-stage cyclone separator | Performing Operations; Transporting | 63 | Expired |
| US5234051A | Compact heat exchanger-ventilation unit for a vehicle | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4339072A | Centrifuge for separating solids/liquids mixtures | Performing Operations; Transporting | 48 | Expired |
| US4640681A | Method and apparatus for the removal of harmful and waste materials by combustion | Emerging Cross-Sectional Technologies | 48 | Expired |
| US4428727A | Burner for solid fuels | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US4378906A | Solid jacket centrifuge for material exchange between liquids | Performing Operations; Transporting | 38 | Expired |
| US4369915A | Method and apparatus for regulating the differential rpm of two rotating parts | Performing Operations; Transporting | 38 | Expired |
| USD256017S | Tractor | General | 37 | Expired |
| US4429588A | Steering wheel for a motor vehicle, particularly for a tractor | Emerging Cross-Sectional Technologies | 36 | Expired |
| US3970552A | Method and means for separation of liquids from a mixture of solids and liquids | Performing Operations; Transporting | 35 | Expired |
| US4069978A | Fuel injection valve | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4619239A | Fuel injection arrangement for internal combustion engines | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US5300910A | Magnet system | Electricity | 32 | Expired |
| USD247624S | Tractor | General | 32 | Expired |
| US4434934A | System for heating the operators cabin of a machine powered by an internal combustion engine | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4293995A | Method of making camshaft for reciprocable piston engines | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4668213A | Method and apparatus for controlling the differential speed between the centrifuge drum and the screw conveyor of a worm centrifuge | Performing Operations; Transporting | 30 | Expired |
| US4023418A | Change gear transmission in group construction, especially for land vehicles and vehicles for the building industry | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4870913A | Grate cooler for cooling hot bulk material | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4703897A | Method and apparatus for continuous pressure comminution of brittle grinding stock | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4617010A | Apparatus for the partial dehydration of sludge in the centrifuge field of a solid jacket centrifuge | Performing Operations; Transporting | 25 | Expired |
| US4228655A | Internal combustion engine and a method of operation thereof | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4728044A | Apparatus for the comminution and grinding of brittle grinding stock, particularly of damp initial material | Performing Operations; Transporting | 24 | Expired |
| US4726531A | Mechanism for the comminution of grinding of brittle grinding stock | Emerging Cross-Sectional Technologies | 23 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.