USD253686SExpiredUtility

Control knob

89
Assignee: GEM PRODUCTS INCPriority: Oct 25, 1977Filed: Oct 25, 1977Granted: Dec 18, 1979
Est. expiryOct 25, 1997(expired)· nominal 20-yr term from priority
Inventors:Darrel M. WooldridgeEugene T. Mckinnon
89
PatentIndex Score
24
Cited by
1
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a control knob, as shown and described.

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