USD255352SExpiredUtility

Headphone

Assignee: KOSS CORPPriority: Feb 6, 1978Filed: Feb 6, 1978Granted: Jun 10, 1980

Est. expiryFeb 6, 1998(expired)· nominal 20-yr term from priority

PatentIndex Score

117

Cited by

References

Claims

exact text as granted — not AI-modified

The ornamental design for a headphone, as shown.

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