USD300709SExpiredUtility
Vacuum flask
Individually held — no corporate assignee on recordPriority: Feb 18, 1986Filed: Feb 18, 1986Granted: Apr 18, 1989
Est. expiryFeb 18, 2006(expired)· nominal 20-yr term from priority
Inventors:Jeng-Cheng Chen
62
PatentIndex Score
14
Cited by
1
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a vacuum flask, as shown and described.
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