USD330076SExpiredUtility
Fireplace heat exchange unit
Individually held — no corporate assignee on recordPriority: Mar 12, 1991Filed: Mar 12, 1991Granted: Oct 6, 1992
Est. expiryMar 12, 2011(expired)· nominal 20-yr term from priority
Inventors:Dennis D. Evans
61
PatentIndex Score
12
Cited by
8
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a fireplace heat exchange unit, as shown.
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