73812902
Jul 17, 1989
EQUIPMENT FOR TEACHING TELEPHONE COMMUNICATION TECHNIQUES, NAMELY, CUSTOM MANUFACTURED TELEPHONES, AUDIO CASSETTE RECORDERS, AND CONTROLS FOR LINKING THE TELEPHONES WITH THE AUDIO CASSETTE RECORDERS; PRERECORDED AUDIO CASSETTE TAPES FEATURING INSTRUCTION IN TELEPHONE COMMUNICATION TECHNIQUES; AND INSTRUCTION BOOKS AND MANUALS SOLD THEREWITH
Electrical and Scientific Apparatus