Helmut Meyer
60Patents
10h-index
101Co-inventors
81Inventor score
Filing activity: Jan 24, 1975 → May 3, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4655879A | Glycerol distillation process | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5296787A | Method for regulating a motor current of a brushless D.C. motor | Electricity | 30 | Expired |
| US4992925A | Converter with intermediate d.c. circuit | Electricity | 24 | Expired |
| US4897584A | Device and method for detecting the coil temperature of a direct-current motor, especially a brushless direct-current motor | Electricity | 20 | Expired |
| US4879497A | Method and device for measuring the temperature of a brushless d-c motor | Electricity | 17 | Expired |
| US5169617A | Method of treating produced gypsum | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5198738A | Method of determining the rotational speed of a brushless DC-motor | Electricity | 12 | Expired |
| US5418451A | Apparatus for measuring at least one state variable of a brushless direct-current motor | Electricity | 11 | Expired |
| US8398949B2 | Carbon nanotube powder, carbon nanotubes, and processes for their production | Emerging Cross-Sectional Technologies | 10 | Active |
| US9315331B2 | Machine having a pneumatic drum for processing sheets of different formats | Performing Operations; Transporting | 10 | Active |
| US6169276A | Electrical heating apparatus | Electricity | 10 | Expired |
| US4013478A | Process for increasing resistance of glass products to cement and cementitious mixtures thereof | Chemistry; Metallurgy | 9 | Expired |
| US7025303B2 | Turning bar for contactless guidance of a tubular film | Performing Operations; Transporting | 9 | Expired |
| US7036763B2 | Winding apparatus and method for performing a change of winding tube in a winding apparatus | Performing Operations; Transporting | 9 | Expired |
| US5021735A | Opto-electronic bachometer and position detector of an electric motor | Electricity | 8 | Expired |
| US7331289B2 | Modular sheet-fed rotary printing press | Performing Operations; Transporting | 7 | Expired |
| US5361021A | Method for suppressing current peaks during commutation of a brushless direct-current motor | Electricity | 6 | Expired |
| US7287473B2 | Method for selecting printing material in a printing press and printing press | Performing Operations; Transporting | 6 | Active |
| US4401296A | Electro-metal smelting furnace with taphole arranged at the bottom | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7093785B2 | Transverse cutting device for a web of material and winding device for the web of material | Performing Operations; Transporting | 5 | Expired |
| US4851763A | Current-measuring device, especially for determining the motor current of a direct-current motor | Physics | 5 | Expired |
| US6338453B1 | Winding device having a winding shaft and additional bearings | Performing Operations; Transporting | 5 | Expired |
| US8026681B2 | Safe electric braking device for printing presses and method of electrically braking an electric drive in a machine processing printing material | Electricity | 5 | Active |
| US4764703A | Igniter plug with vibration damping means | Electricity | 5 | Expired |
| US6632009B2 | Coaxial extruder drive | Performing Operations; Transporting | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.