USD324201SExpiredUtility

Three-blade propeller

83
Assignee: HANNON R DOUGLASPriority: Mar 1, 1990Filed: Mar 1, 1990Granted: Feb 25, 1992
Est. expiryMar 1, 2010(expired)· nominal 20-yr term from priority
Inventors:R. Douglas HannonGeorge E. Lackman
83
PatentIndex Score
27
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a three-blade propeller, as shown and described.

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