Johan Hellgren
13Patents
3h-index
6Co-inventors
53Inventor score
Filing activity: Mar 17, 1994 → Jul 26, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7688990B2 | Hearing aid with anti feedback system | Electricity | 9 | Active |
| US5436859A | Method to reduce the power consumation of a digital filter bank analyzer reducing the number of multiplications | Electricity | 7 | Expired |
| US8538052B2 | Generation of probe noise in a feedback cancellation system | Electricity | 4 | Active |
| US8687832B2 | Hearing aid system with feedback arrangement to predict and cancel acoustic feedback, method and use | Electricity | 3 | Active |
| US7925031B2 | Audio system with feedback detection means | Electricity | 3 | Active |
| US10309943B2 | Infrared gas detector with secondary sensor | Physics | 2 | Active |
| US8477952B2 | Audio system with feedback detection means | Electricity | 2 | Active |
| US10866225B2 | Wide range gas detection using an infrared gas detector | Physics | 1 | Active |
| US11982651B2 | Method for adapting the concentration of a sample gas in a gas mixture to be analysed by a gas chromatograph assembly, and chromatograph assembly therefore | Physics | 0 | Active |
| US8798297B2 | Listening system with an improved feedback cancellation system, a method and use | Electricity | 0 | Active |
| US10352848B2 | Gas detection using gas modulation | Physics | 0 | Active |
| US10436708B2 | Method for quantifying the amount of optically interfering gas impurities | Physics | 0 | Active |
| US9338562B2 | Listening system with an improved feedback cancellation system, a method and use | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.