71638968
Dec 4, 1952
Sep 1, 1953
NON-MAGNETIC TAPE TO BE ATTACHED TO AN END OF, OR SPLICED IN ALONG THE LENGTH OF, A STRIP OF MAGNETIC SOUND-RECORDING TAPE, WHEREBY PREDETERMINED PERIODS OF SILENCE MAY BE OBTAINED WHEN SAID SOUND-RECORDING TAPE IS PLAYED IN A MACHINE
Housewares and Glass