On 31 March 1966 about 20 companies were established in Illinois.
CORP_18884241
CORP_18884259
CORP_18894327
CORP_46402014
CORP_46402065
CORP_46402103
CORP_46402201
CORP_46402227
CORP_46402235
CORP_46402251
CORP_46402260
CORP_46402278
CORP_46402286
CORP_46402308
CORP_46402316
CORP_46402341
CORP_46402359
CORP_46402383
CORP_46412516
CORP_46412541