USD289414SExpiredUtility

Duct design calculator

34
Assignee: CARRIER CORPPriority: Jun 19, 1985Filed: Jun 19, 1985Granted: Apr 21, 1987
Est. expiryJun 19, 2005(expired)· nominal 20-yr term from priority
Inventors:David C. PetersDerek P. WilliamsWilliam C. Chadwick
34
PatentIndex Score
3
Cited by
7
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a duct design calculator, as shown.

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