USD450541SExpiredUtility

Vacuum flask

52
Priority: Jun 16, 1998Filed: Jun 16, 1998Granted: Nov 20, 2001
Est. expiryJun 16, 2018(expired)· nominal 20-yr term from priority
Inventors:Frank Teh-Hsiung Huang
52
PatentIndex Score
7
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for vacuum flask, as shown and described.

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