Stephen D. Julstrom
25Patents
18h-index
13Co-inventors
78Inventor score
Filing activity: Apr 6, 1984 → Feb 15, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4658425A | Microphone actuation control system suitable for teleconference systems | Electricity | 320 | Expired |
| US6694034B2 | Transmission detection and switch system for hearing improvement applications | Electricity | 123 | Expired |
| US7522740B2 | Multi-coil coupling system for hearing aid applications | Electricity | 60 | Active |
| US5673327A | Microphone mixer | Electricity | 55 | Expired |
| US4712231A | Teleconference system | Electricity | 53 | Expired |
| US5297210A | Microphone actuation control system | Electricity | 52 | Expired |
| US8460816B2 | Rechargeable battery assemblies and methods of constructing rechargeable battery assemblies | Emerging Cross-Sectional Technologies | 47 | Active |
| US8174233B2 | Magnetically coupled battery charging system | Electricity | 43 | Active |
| US8174234B2 | Magnetically coupled battery charging system | Electricity | 41 | Active |
| US8237402B2 | Magnetically coupled battery charging system | Electricity | 40 | Active |
| US4696036A | Directional enhancement circuit | Electricity | 40 | Expired |
| US8022775B2 | Systems and methods for maintaining a drive signal to a resonant circuit at a resonant frequency | Electricity | 38 | Active |
| US7099486B2 | Multi-coil coupling system for hearing aid applications | Electricity | 38 | Expired |
| US8649540B2 | Electronic earplug | Electricity | 36 | Active |
| US8160261B2 | Audio monitoring system | Electricity | 35 | Active |
| US6560344B1 | Miniature surface mounted directional microphone assembly | Electricity | 25 | Expired |
| US4991166A | Echo reduction circuit | Electricity | 24 | Expired |
| US7110553B1 | Directional microphone assembly for mounting behind a surface | Electricity | 19 | Expired |
| US4811019A | Delta modulation encoding/decoding circuitry | Electricity | 12 | Expired |
| US9859990B2 | Telecoil hum filter | Electricity | 2 | Active |
| US9232292B2 | Electronic earplug windscreen | Electricity | 2 | Active |
| US10476609B2 | Telecoil hum filter | Electricity | 0 | Active |
| US11894819B2 | Audio monitoring system | Electricity | 0 | Active |
| US11095965B2 | System and method for reducing wind noise in an electronic hearing protector | Electricity | 0 | Active |
| US10779069B2 | System and method for reducing wind noise in an electronic hearing protector | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.