USD304856SExpiredUtility
Heat exchanger
Est. expiryAug 19, 2005(expired)· nominal 20-yr term from priority
Inventors:Hisao Aoki
56
PatentIndex Score
7
Cited by
25
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a heat exchanger, as shown and described.
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