A defense contractor says it's developing a wireless communications system for underground miners.
That could make for faster rescues, but engineers say it wouldn't have helped locate the six coal miners trapped inside Crandall Canyon in central Utah.
The collapse filled tunnels with debris that would have blocked wireless signals.
Still, wireless technology has long been sought as a Holy Grail for other types of mine rescues.
Global Security and Engineering Solutions says it's radio signals can turn corners into far reaches of a mine.
Federal officials said they couldn't immediately respond to the company's claims.
The National Institute for Occupational Safety and Health funded development of the technology.