Countersink roof bit drill and method for using the same

Assignee

• Kennametal
• Jennmar

Inventors

• Brandon S. Stables (2 patents)
• Douglas E. Bise (15 patents)
• John G. Oldsen (49 patents)
• Donald E. Keller (10 patents)
• David Rife (2 patents)
• John C. Stankus (79 patents)
• Chad A. Swope (14 patents)

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