Cap for banded earplug

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment

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1401

Patent

active

D03956571

REFERENCES:
patent: D229312 (1973-11-01), Itagaki
patent: D269611 (1983-07-01), Saito
patent: 1640152 (1927-08-01), Ingram et al.
patent: 4055233 (1977-10-01), Huntress
Danavox catalog, stetomike 808 series, dated May 1982, (p. 3, bottom left side).

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