ProNet makes paging systems and answering services for the medical community. They were an early market leader in wireless paging services. IPO (Nasdaq: PNET), then purchased by MetroCall. Source – Dow Jones VentureSources

Provided wireless services in various countries in South America. Sold to Nextel International.

OneSpot is a provider of third-party content aggregation for online publishers. The company’s service, available on a subscription basis, monitors Web sources, finding and linking relevant content for publishers of Web sites, blogs, and email newsletters.

MetroPCS owns licenses to operate broadband PCS in the San Francisco Bay Area, Sacramento, Atlanta, and Miami.

Develops and markets cellular fraud detection equipment and cellular services. IPO, then acquired by Lightbridge (Nasdaq:LTBG).