DUO
○ Dead · CancelledU.S. federal trademark · Serial No. 73230066 · Reg. No. 1139436
Filing Date
September 4, 1979
Registration Date
September 9, 1980
Goods & Services
Hearing Aids
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Run a free trademark search →Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.