EXHIBIT 21.1 SUBSIDIARIES OF THE COMPANY The following is a list of the subsidiaries of Autoclave Engineers, Inc. The Company owns, directly or indirectly, 100% of the voting securities of each subsidiary. State of Jurisdiction Name or Incorporation - ---- --------------------- Unit Foreign Sales Corporation Virgin Islands Unit Instruments, Inc. California Unit Instruments Ireland Limited Ireland Unit Instruments Japan, Inc. Japan Unit Instruments, GmbH Germany Unit Instruments Korea Ltd. South Korea