USD340248SExpiredUtility
Roof drill bit for mining
Individually held — no corporate assignee on recordPriority: May 23, 1991Filed: May 23, 1991Granted: Oct 12, 1993
Est. expiryMay 23, 2011(expired)· nominal 20-yr term from priority
Inventors:William J. Brady
94
PatentIndex Score
50
Cited by
9
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a roof drill bit for mining, as shown and described.
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