EX-21 9 a2031940zex-21.htm EXHIBIT 21 Prepared by MERRILL CORPORATION www.edgaradvantage.com

EXHIBIT 21

Subsidiaries of the Registrant

Parent
   Subsidiary
   Percentage of
Ownership
   State of Incorporation
or Organization
HEI, Inc.   Cross Technology, Inc.   100%   Minnesota
HEI, Inc.   HEI Export, Inc.   100%   Barbados