Roof drill bit for mining

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Information

Patent Grant
D340248

References
Source

Patent Number
D340,248
Date Filed
Thursday, May 23, 1991
33 years ago
Date Issued
Tuesday, October 12, 1993
31 years ago

Inventors
- William J. Brady
Examiners
- Ansher; Bernard
- Morris; Sandra
Agents
- Heywood; Richard G.

US Classifications
- D15 - Machines not elsewhere specified
Field of Search
- US
- D15 21
- D15 139
- 175 377
- 175 378
- 175 393
- 175 418
- 175 4201
- 175 427
- 175 430
- 299 79
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for a roof drill bit for mining, as shown and described.

US Referenced Citations (9)

Number	Name	Date	Kind
D265205	Munson	Jun 1982
D273390	Lassiter	Apr 1984
D273391	Lassiter	Apr 1984
4285618	Shanley, Jr.	Aug 1981
4637658	Annipajo et al.	Jan 1987
4683965	Walton et al.	Aug 1987
4733734	Bardin et al.	Mar 1988
4817742	Whysong	Apr 1989
4928777	Shirley-Fisher	May 1990