USD813189SActiveUtility

Vacuum tube based audio amplifier

64
Individually held — no corporate assignee on recordPriority: Aug 10, 2017Filed: Aug 10, 2017Granted: Mar 20, 2018
Est. expiryAug 10, 2037(~11 yrs left)· nominal 20-yr term from priority
Inventors:Eric J. Lundgard
64
PatentIndex Score
13
Cited by
13
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a vacuum tube based audio amplifier, as shown and described.

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