Inventor

WALLIS DAVID W

US8 patents

⚠️ This page may combine multiple inventors who share the name “WALLIS DAVID W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MOTOROLA SOLUTIONS INC

4 patents

US9231481B2Jan 5, 2016

Methods and systems for providing a ballast load for a magnetic resonant power supply

MOTOROLA SOLUTIONS INC0 citations36

S W I S INC

1 patent

US4162461AJul 24, 1979

Apparatus for extracting the fundamental frequency from a complex audio wave form

S W I S INC31 citations87

ELECTROMAGNETIC SCIENCES INC

1 patent

US5089716AFeb 18, 1992

Simplified driver for controlled flux ferrite phase shifter

ELECTROMAGNETIC SCIENCES INC10 citations66

IN A PINCH INC

1 patent

US5848135ADec 8, 1998

Battery-powered adapter

IN A PINCH INC4 citations47

WALLIS DAVID W

1 patent

US8803117B2Aug 12, 2014

Apparatus and method for non-latching, bi-directional communication over an electrically isolated data link

WALLIS DAVID W1 citations40

WALLIS DAVID W

MOTOROLA SOLUTIONS INC

Power converter apparatus

Ultrasonic charging apparatus, system and method

Ultrasonic transmitter

Methods and systems for providing a ballast load for a magnetic resonant power supply

S W I S INC

Apparatus for extracting the fundamental frequency from a complex audio wave form

ELECTROMAGNETIC SCIENCES INC

Simplified driver for controlled flux ferrite phase shifter

IN A PINCH INC

Battery-powered adapter

WALLIS DAVID W

Apparatus and method for non-latching, bi-directional communication over an electrically isolated data link