ERF Wireless, Inc. (ERFB)

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You can really appreciate the business strategy here. This strategy has not only allowed ERF Wireless to become one of the largest WISPs in the U.S., it has also successfully positioned the company as the nation’s leading provider of secure terrestrial wireless networks for the oil and gas industry as well as for the regional banking industry. In addition, ERF Wireless has recently increased its focus on using these same networks to provide terrestrial wireless broadband to regional healthcare facilities and education institutions.