Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Background communication using shadow of audio signal

Background communication using shadow of audio signal

US Patent 6891809 · Granted May 10, 2005

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Acoustic security system and method2018
Energy storage for PV water heater2017
Hearing aid with capacitive switch2017
Method for calibrating a hearing aid2015
Light powered hearing aid2014
Method for communicating with a hearing aid2013
Wireless gateway for hearing aid2012
Method for limiting current and circuit therefor2012
Method for identifying a hearing aid2011
Method for identifying a hearing aid2010
Rechargeable hearing aid2009
Numerically controlled oscillator2009