SOUND RECORDING AND REPRODUCING UNITS AND ACCESSORIES, NAMELY, PORTABLE DESKTOP AND CENTRAL DICTATION AND TRANSCRIPTION MACHINES; TELEPHONE ANSWERING MACHINES; COMMUNICATION LOGGERS FOR RECORDING AND REPRODUCING MULTIPLE TELEPHONE, RADIO AND FACSIMILE COMMUNICATIONS USED FOR QUALITY MONITORING AND LIABILITY RECORDING PURPOSES; CASES FOR AUDIO TAPE CASSETTES; CASES FOR DICTATION AND TRANSCRIPTION MACHINES AND DUSTCOVERS FOR DICTATION AND TRANSCRIPTION MACHINES