Wilo AG
28Patents
5Active
28Granted
37Portfolio score
Filing activity: Aug 30, 1993 → Jan 19, 2009 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6177741A | Electric-motor wiring system | Electricity | 47 | Expired |
| US6474951B2 | Controller for pump and valve | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US6365998B1 | Canned motor pump with winding carrier | Electricity | 29 | Expired |
| US5362258A | Cable-attaching device for a pump | Electricity | 28 | Expired |
| US6028386A | Winding support for an electric motor | Electricity | 23 | Expired |
| US6033183A | Impeller for a rotary pump | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US6229240A | Split-tube motor | Electricity | 20 | Expired |
| US6445098B1 | Can for a synthetic pump motor | Electricity | 18 | Expired |
| US6091174A | Electric motor | Electricity | 17 | Expired |
| US5466127A | Device for switching a submersible motor-driven pump on and off | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6175173A | Tube pump | Electricity | 17 | Expired |
| US6276946A | Plug-in connection for electric motors | Electricity | 14 | Expired |
| US7520454B2 | Cutting tool pertaining to a centrifugal pump | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US8226385B2 | Motor centrifugal pump having coolant pump | Electricity | 13 | Active |
| US6473562B1 | Method for low-speed operation of brushless DC motors | Electricity | 11 | Expired |
| US6342770B1 | Method for starting brushless DC motors | Electricity | 10 | Expired |
| US5692880A | Impeller containing a pair of blades wherein the leading edge of one of the blades is thicker than the leading edge of the other | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5480290A | Submersible motor-driven pump | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US6138618A | Radiator for a vehicle engine | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5516261A | Unchokable centrifugal pump | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US7938404B2 | Slide ring seal | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US5604476A | Protective device for an electrical consumer | Electricity | 5 | Expired |
| US6801031B1 | Method and apparatus for current measurement for electronically-controlled pump | Physics | 3 | Expired |
| US6199517A | Latent heat storage system for use in a vehicle | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6327424A | Method of and circuit for operating a motor using power transistors | Electricity | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.