USD284487SExpiredUtility
Aural/visual signalling instrument
Individually held — no corporate assignee on recordPriority: May 20, 1983Filed: May 20, 1983Granted: Jul 1, 1986
Est. expiryMay 20, 2003(expired)· nominal 20-yr term from priority
Inventors:Richard J. Pratt
86
PatentIndex Score
26
Cited by
1
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for an aural/visual signalling instrument, as shown and described.
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