David W. Wallis
12Patents
3h-index
18Co-inventors
57Inventor score
Filing activity: Jul 25, 1977 → Nov 21, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4162461A | Apparatus for extracting the fundamental frequency from a complex audio wave form | Electricity | 27 | Expired |
| US5089716A | Simplified driver for controlled flux ferrite phase shifter | Electricity | 8 | Expired |
| US7855623B2 | Low loss RF transmission lines having a reference conductor with a recess portion opposite a signal conductor | Emerging Cross-Sectional Technologies | 3 | Active |
| US5848135A | Battery-powered adapter | Electricity | 2 | Expired |
| US9231481B2 | Power converter apparatus | Electricity | 2 | Active |
| US8803117B2 | Apparatus and method for non-latching, bi-directional communication over an electrically isolated data link | Electricity | 1 | Active |
| US11879470B2 | Bench-top time of flight mass spectrometer | Electricity | 0 | Active |
| US12123421B2 | Bench-top time of flight mass spectrometer | Electricity | 0 | Active |
| US10065212B2 | Ultrasonic transmitter | Electricity | 0 | Active |
| US9780571B2 | Methods and systems for providing a ballast load for a magnetic resonant power supply | Electricity | 0 | Active |
| US9711973B2 | Wireless power transfer using a microwave signal | Electricity | 0 | Active |
| US9837849B2 | Ultrasonic charging apparatus, system and method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.