Patrick D. Griffis
14Patents
7h-index
10Co-inventors
63Inventor score
Filing activity: Mar 9, 1979 → Oct 8, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4479235A | Switching arrangement for a stereophonic sound synthesizer | Electricity | 40 | Expired |
| US4254447A | Integrated circuit heat dissipator | Electricity | 29 | Expired |
| US4239939A | Stereophonic sound synthesizer | Electricity | 26 | Expired |
| US4387413A | Semiconductor apparatus with integral heat sink tab | Electricity | 17 | Expired |
| US9094771B2 | Method and system for upmixing audio to generate 3D audio | Electricity | 10 | Active |
| US4511924A | Frequency translation phase-locked loop for separate or intercarrier type television sound detection | Electricity | 10 | Expired |
| US4470070A | Frequency translation phase-locked loop television sound detection system | Electricity | 9 | Expired |
| US4405948A | Volume control signal coupling circuit in an audio signal processing system | Electricity | 7 | Expired |
| US4404429A | Matching volume control characteristics for two channels | Electricity | 5 | Expired |
| US10395421B2 | Surround ambient light sensing, processing and adjustment | Electricity | 4 | Active |
| US9916638B2 | Transformation of dynamic metadata to support alternate tone rendering | Electricity | 1 | Active |
| US10937229B2 | Surround ambient light sensing, processing and adjustment | Electricity | 1 | Active |
| US10510134B2 | Transformation of dynamic metadata to support alternate tone rendering | Electricity | 0 | Active |
| US11010860B2 | Transformation of dynamic metadata to support alternate tone rendering | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.