EXHIBIT 10-20 NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (the "Act"). NEITHER THIS WARRANT NOR SUCH SHARES MAY BE SOLD, TRANSFERRED,...Warrant Agreement • April 30th, 1997 • Executone Information Systems Inc • Services-telephone interconnect systems • Virginia
