USD384084SExpiredUtility

Rotary cone drill bit

93
Assignee: DRESSER INDPriority: Sep 12, 1995Filed: Sep 12, 1995Granted: Sep 23, 1997
Est. expirySep 12, 2015(expired)· nominal 20-yr term from priority
Inventors:Alan D. HuffstutlerHarry M. Campos, Jr.
93
PatentIndex Score
56
Cited by
83
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a rotary cone drill bit, as shown.

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