The United States Patent Office issued a patent that covers the combination of radio modem and GPS technologies to improve a precision GPS system.

The United States Patent Office issued a patent (# 6,751,467) that covers the combination of radio modem and GPS technologies in ways that reduces cost and improves performance of a GPS system used in survey and other precision applications. This patent was issued to Pacific Crest Corporation on June 15, 2004.

Source: Pacific Crest, July 13, 2004