Johannes Volkl
17Patents
9h-index
33Co-inventors
72Inventor score
Filing activity: Sep 29, 1995 → Oct 8, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6849881B1 | Optical semiconductor device comprising a multiple quantum well structure | Electricity | 101 | Expired |
| US7106090B2 | Optical semiconductor device with multiple quantum well structure | Electricity | 55 | Expired |
| US7015514B2 | Light-emitting diode and method for the production thereof | Electricity | 37 | Expired |
| US6897488B2 | Radiation-emitting chip | Electricity | 21 | Expired |
| US5707446A | Device for producing SiC single crystals | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5989340A | Process and device for sublimation growing of silicon carbide monocrystals | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6891199B2 | Radiation-emitting semiconductor chip and light-emitting diode | Electricity | 15 | Expired |
| US6497764B2 | Method for growing SiC single crystals | Chemistry; Metallurgy | 14 | Expired |
| US5968265A | Method for producing silicon carbide monocrystals | Chemistry; Metallurgy | 14 | Expired |
| US5985026A | Seed crystal for producing monocrystals and method for producing SiC monocrystals or monocrystalline SiC layers | Chemistry; Metallurgy | 9 | Expired |
| US7556974B2 | Optical semiconductor device with multiple quantum well structure | Electricity | 7 | Active |
| US8138511B2 | Radiation-emitting semiconductor component and method for producing the semiconductor component | Electricity | 6 | Active |
| US7169632B2 | Radiation-emitting semiconductor component and method for producing the semiconductor component | Electricity | 5 | Expired |
| US6344085B2 | Device and method for producing at least one SiC single crystal | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6689212B2 | Method for growing an &agr;-SiC bulk single crystal | Chemistry; Metallurgy | 1 | Expired |
| US10781498B2 | Combined system for producing steel and method for operating the combined system | Emerging Cross-Sectional Technologies | 0 | Active |
| US11420867B2 | Process for combined production of methanol and ammonia | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.