TREA

Roof drill bit for mining machine

Follow

Information

  • Patent Grant
  • D351174
  • Patent Number
    D351,174
  • Date Filed
    Monday, July 19, 1993
    31 years ago
  • Date Issued
    Tuesday, October 4, 1994
    30 years ago
  • Inventors
  • Examiners
    • Douglas; Alan P.
    • Davis; Antoine D.
    Agents
    • Heywood; Richard G.
  • US Classifications
    Field of Search
    • US
    • 175 379
    • 175 385
    • 175 393
    • 175 418
    • 175 4201
    • 175 421
    • 175 430
    • 175 427
    • 175 431
    • 175 432
    • 299 29
    • D10 138
    • D10 139
    • Term of Grant
      14Years
Information
Abstract
Description
Claims
  • The ornamental design for a roof drill bit for mining machine, as shown and described.
US Referenced Citations (4)
Number Name Date Kind
4440247 Sartor Apr 1984
4733734 Bardin et al. Mar 1988
4817742 Whysong Apr 1989
4928777 Shirley-Fisher May 1990
Continuation in Parts (1)
Number Date Country
Parent 706113 May 1991