USD340248SExpiredUtility

Roof drill bit for mining

94
Assignee: BRADY WILLIAM JPriority: 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-modified
The ornamental design for a roof drill bit for mining, as shown and described.

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