USD330248SExpiredUtility

Air to air heat exchanger

56
Assignee: STIRLING TECH INCPriority: Jul 23, 1990Filed: Jul 23, 1990Granted: Oct 13, 1992
Est. expiryJul 23, 2010(expired)· nominal 20-yr term from priority
Inventors:Catherine J. ChagnotCraig J. KinzelmanNoshir D. ColahHarry Dewar
56
PatentIndex Score
13
Cited by
22
References
1
Claims

Claims

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

Join the waitlist — get patent alerts

Track USD330248S — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.