Harald Hoffmann
27Patents
9h-index
42Co-inventors
75Inventor score
Filing activity: Aug 15, 1975 → Jul 3, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9615692B2 | Grill and/or frying plate for the use on cooking hobs | Human Necessities | 78 | Active |
| US4613344A | Method and apparatus for cleaning hot gases produced during a coal gasification process | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4418307A | Method and apparatus for controlling the rotational speed and phase of synchronous motors | Physics | 18 | Expired |
| US4336038A | Filter mat | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4449086A | Method and apparatus for controlling and regulating a motor with a permanent magnetic rotor | Electricity | 15 | Expired |
| US4670864A | Voice interruptible alarm device | Physics | 14 | Expired |
| US7407728B2 | Alkaline cell or battery | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5401594A | Hydrophilized separator material of nonwoven fabric for electrochemical cells and a method for its production | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4137379A | Storage battery with separator of dumbbell-shaped fibers | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4566882A | Filter for cleaning gases | Performing Operations; Transporting | 6 | Expired |
| US3997929A | Carrier sleeve | Performing Operations; Transporting | 4 | Expired |
| US9140458B2 | Cooktop-interface having projection display device | Physics | 4 | Active |
| US6280880A | Method for surface treatment of fibrous polyphenylene sulfide or polysulfone | Emerging Cross-Sectional Technologies | 4 | Expired |
| US10912158B2 | Induction cooking hob | Electricity | 2 | Active |
| US10349467B2 | Cooking hob with a balance system and a method for adjusting the temperature of a cooking vessel | Electricity | 2 | Active |
| US9210951B2 | Tobacco cut filler including cut rolled stems | Human Necessities | 2 | Active |
| US4751541A | Apparatus for treating exposed photosensitive materials | Physics | 2 | Expired |
| US10393388B2 | Control unit for a cooking hob | Electricity | 2 | Active |
| US4205108A | Surface finished fabric | Emerging Cross-Sectional Technologies | 2 | Expired |
| US10088145B2 | Illumination device for a cooking zone element of a cooking hob covered by a transparent panel and a corresponding cooking zone element and cooking hob | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US8359442B2 | Computer system with controlled data access | Physics | 0 | Active |
| US10555381B2 | Induction hob | Electricity | 0 | Active |
| US11653423B2 | Induction cooking hob and method for checking an optimal position of a cooking pot on the induction cooking hob | Emerging Cross-Sectional Technologies | 0 | Active |
| US11088863B2 | Remote control system for controlling a domestic appliance | Electricity | 0 | Active |
| US10837649B2 | Control unit for a domestic appliance | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.