EXHIBIT 21 GenRad, Inc. Schedule of Subsidiaries as of January 3, 1998 Subsidiary Name State/Jurisdiction of Incorporation - --------------- ----------------------------------- GenRad Canada Limited Canada GenRad Asia PTE Limited Singapore GenRad SA France GenRad GmbH Germany GenRad China Limited China GenRad Benelux B.V. Netherlands GenRad Europe Limited England GenRad Limited England GenRad Holdings Limited England GenRad Securities Corporation Massachusetts GenRad Mexico Incorporated Delaware Mitron Corporation Oregon Mitron Europe Limited England All subsidiaries are Consolidated Subsidiaries and do business under their own name.