USD378521SExpiredUtility
Audio preamplifier
Individually held — no corporate assignee on recordPriority: Apr 12, 1995Filed: Apr 12, 1995Granted: Mar 18, 1997
Est. expiryApr 12, 2015(expired)· nominal 20-yr term from priority
Inventors:Joseph R. Neuman
17
PatentIndex Score
3
Cited by
0
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for an audio preamplifier, as shown.
Join the waitlist — get patent alerts
Track USD378521S — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.