EXHIBIT (20) c

For Immediate Release
Contact:    Anne Marie Bugge
            (206) 487-7081
                              

             ATL COMPLETES INTERSPEC ACQUISITION


BOTHELL, Washington, May 17, 1994--ATL (Advanced Technology
Laboratories, Inc.), a worldwide leader in diagnostic
medical ultrasound, said today that the transaction to
acquire Interspec, Inc. of Ambler, Pennsylvania is complete
and is effective 11:59 P.M. EDT, Tuesday, May 17, 1994.
Interspec, a leader in the U.S. cardiology ultrasound
market, will operate as a wholly owned subsidiary of ATL
through an exchange of one share of Interspec stock for
0.413 of a share of ATL stock.  Shareholders of both
companies voted May 16, 1994 to approve the merger.  As previously
announced, Interspec stock (Nasdaq:ISPC) ceased trading as
of the close of market on May 17, 1994.

First Chicago Trust Company of New York is mailing
transmittal forms to former Interspec shareholders for the
exchange of Interspec stock certificates for ATL
certificates.

ATL, with headquarters in Bothell, Washington, is a
worldwide leader in the development, manufacture,
distribution and service of diagnostic medical ultrasound
systems.  ATL stock is traded on the Nasdaq National Market
under the symbol ATLI.
                              
                             ###
                         051794/110