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A jazz musician named Teri Pall invented a version of the cordless phone in 1965 but could not market her invention, as its 2-mile (3.2 km) range caused its radio signals to interfere with aircraft communications. In 1968, she sold her rights to the cordless phone to a manufacturer who modified it for practical use.
And by the time they gained widespread popularity, he had suffered the fate of a legion of inspired inventors: His patents had expired. But what a difference Gross' gizmos made. Gross, who died Dec. 21 in Sun City, Ariz., at the age of 82, invented the walkie-talkie, the wireless pager and the cordless telephone. He pioneered citizens band radio. His patents led to technological breakthroughs that became icons of the late 20th century, such as the cellular telephone.