EX-21 4 ex21.htm SUBSIDIARIES OF THE REGISTRANT ex21.htm
Exhibit 21
   
SUBSIDIARIES
   
The following is a list of the significant and other active and inactive subsidiaries of the Company as of September 27, 2011:
   
   
Significant Subsidiaries
Jurisdiction of Incorporation
 
Telecommunications Transmission Segment
Comtech EF Data Corp.
Delaware
 
Mobile Data Communications Segment
Comtech Mobile Datacom Corporation
Delaware
 
 
Other Active Subsidiaries
 
Telecommunications Transmission Segment
Comtech Systems, Inc.
Delaware
Memotec Inc. (a subsidiary of Comtech EF Data Corp.)
New Brunswick, Canada
Comtech EF Data Pte. Ltd.
Singapore
Beijing Comtech EF Data Equipment Repair Service, Co., Ltd.
     (a subsidiary of Comtech EF Data Corp.)
China
 
Mobile Data Communications Segment
Comtech AeroAstro, Inc.
Delaware
 
RF Microwave Amplifiers Segment
Comtech PST Corp.
New York
Comtech Xicom Technology, Inc.
California
Xicom Technology Europe, Ltd.
     (a subsidiary of Comtech Xicom Technology, Inc.)
United Kingdom
   
 
 
Inactive Subsidiaries
Angels Acquisition Corp.
Delaware
ARMER Communications Engineering Services, Inc.
Delaware
Comtech Antenna Systems, Inc.
Delaware
Comtech Communications Corp.
Delaware
Comtech Comstream, Inc.
Delaware
Comtech CPI Electron Devices Corp.
Delaware
Comtech CPI Microwave Corp.
Delaware
Comtech Systems International, Inc.
Delaware
Comtech Tolt Technologies, Inc.
Delaware
Tiernan Radyne Comstream, Inc.
Delaware