Inventor

FARRAR DOUGLAS M

US18 patents

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

FARRAR DOUGLAS M

APPLE INC

Electronic device accessory

Methods of calibrating tone-based communications systems

Electronic device accessory with ultrasonic tone generator

Communications circuits for electronic devices and accessories

Circuits and methods for amplifying signals

Electronic device accessory

Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications

SANDER WENDELL B

Electronic device and external equipment with configurable audio path circuitry

Methods for communicating with electronic device accessories

Electronic device circuitry for communicating with accessories

Accessory adapter with user input interface

Electronic device circuitry for communicating with accessories

Methods for using an accessory to communicate with an electronic device

APPLE COMPUTER

Method and apparatus for a speaker for a personal computer for selective use as a conventional speaker or as a sub-woofer

Signaling of power modes over an interface bus

System and method for multiplexing control signals over data signal conductors

Methods and apparatus for microphone preamplification

JOHNSON TIMOTHY M

Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications