Lear Siegler, Inc.: product and services directory. Vac-U-Lift Div.: vacuum lift units ; vacuum belt feeder-stacker ; other material handling equipment. Environmental Technology Center Div.: Argos I particulate mass emission monitor. Electronic Instrumentation Div.: Lear-Siegler "Ear-Com" radio attachment earpiece, for transmitting and receiving communications, for firemen, police, construction crews and airport ground personnel. Power Equipment Div.: magnetic partical units. Bogen Communications Div.: transistorized booster amplifier. Automated Systems Div.: "Mailmobile" automatic self-propelled delivery vehicle for offices...this comprises the uncataloged portion.