USD337767SExpiredUtility

Infra-red ray transmission machine for cordless headphone

44
Priority: May 18, 1990Filed: Nov 19, 1990Granted: Jul 27, 1993
Est. expiryMay 18, 2010(expired)· nominal 20-yr term from priority
44
PatentIndex Score
16
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an infra-red ray transmission machine for cordless headphone, as shown.

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