USD282870SExpiredUtility

Air-to-air heat exchanger

28
Assignee: DEL AIR SYSTEMS LTDPriority: Dec 13, 1982Filed: Dec 13, 1982Granted: Mar 4, 1986
Est. expiryDec 13, 2002(expired)· nominal 20-yr term from priority
Inventors:L. BenningE. NovecoskyD. Van Ee
28
PatentIndex Score
3
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for air-to-air heat exchanger, as shown and described.

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