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US2650071A
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1950-03-10 |
1953-08-25 |
Central Mine Equipment Company |
Mining drill
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US2673714A
(en)
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1950-08-05 |
1954-03-30 |
John M Hargrave |
Rock or masonry drill
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US3049033A
(en)
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1959-05-20 |
1962-08-14 |
Erickson Tool Co |
Spade drill and grinding fixture therefor
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US3460409A
(en)
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1967-05-10 |
1969-08-12 |
Allied Machine & Eng Corp |
Chip breaker for spade drill
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AT345628B
(en)
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1976-03-04 |
1978-09-25 |
Amtel Inc |
DOUBLE EDGE FLAT DRILL KNIFE
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US4355932A
(en)
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1980-01-09 |
1982-10-26 |
Santrade Ltd. |
Indexable spade drill blade
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US4503920A
(en)
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1981-08-10 |
1985-03-12 |
Burke Clement |
Masonry bit
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US4595322A
(en)
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1981-08-10 |
1986-06-17 |
Burke Clement |
Spade drill bit
|
|
US4492278A
(en)
*
|
1983-05-09 |
1985-01-08 |
Hughes Tool Company |
Roof bit
|
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US4633959A
(en)
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1985-06-26 |
1987-01-06 |
Vermont American Corporation |
Drill having means for locating cutting bit in a bit holder
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US5297643A
(en)
*
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1990-12-19 |
1994-03-29 |
Kennametal Inc. |
Cold headed center vacuum drill bit
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US5184689A
(en)
*
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1991-03-06 |
1993-02-09 |
Kennametal Inc. |
Radial cut drill bit insert
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US5172775A
(en)
*
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1991-03-06 |
1992-12-22 |
Kennametal Inc. |
Rotary drill bit insert
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USD340248S
(en)
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1991-05-23 |
1993-10-12 |
Brady William J |
Roof drill bit for mining
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US5180022A
(en)
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1991-05-23 |
1993-01-19 |
Brady William J |
Rotary mining tools
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US5220967A
(en)
*
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1991-09-23 |
1993-06-22 |
Sandvik Rock Tools, Inc. |
Drill and self-centering cutter insert therefor
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US5226489A
(en)
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1992-01-10 |
1993-07-13 |
Kennametal Inc. |
Insert spacer assembly
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US5287937A
(en)
*
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1992-06-30 |
1994-02-22 |
The Sollami Company |
Drill bits and the blades therefor
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US5429199A
(en)
*
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1992-08-26 |
1995-07-04 |
Kennametal Inc. |
Cutting bit and cutting insert
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US5375672A
(en)
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1992-10-22 |
1994-12-27 |
Sandvik Rock Tools, Inc. |
Mine roof drill bit and cutting insert therefor
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US5301763A
(en)
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1993-03-02 |
1994-04-12 |
Sandvik Rock Tools, Inc. |
Apparatus for drilling holes in mine roofs and a roof drill bit for use therein
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USD351174S
(en)
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1993-07-19 |
1994-10-04 |
Brady William J |
Roof drill bit for mining machine
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US5458210A
(en)
*
|
1993-10-15 |
1995-10-17 |
The Sollami Company |
Drill bits and blades therefor
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US5400861A
(en)
*
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1994-05-05 |
1995-03-28 |
Kennametal, Inc. |
Rotatable cutting bit assembly
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US6092612A
(en)
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1995-06-07 |
2000-07-25 |
Brady; William J. |
Rotary drilling systems
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US6427782B2
(en)
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1995-06-07 |
2002-08-06 |
The William J. Brady Loving Trust |
Noise suppression drilling system
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US6161635A
(en)
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1995-06-07 |
2000-12-19 |
Brady; William J. |
Drilling system drive steel
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US5875858A
(en)
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1995-06-07 |
1999-03-02 |
Brady; William J. |
Low volume air-water drilling systems and methods
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US6374932B1
(en)
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2000-04-06 |
2002-04-23 |
William J. Brady |
Heat management drilling system and method
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US5535839A
(en)
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1995-06-07 |
1996-07-16 |
Brady; William J. |
Roof drill bit with radial domed PCD inserts
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USD430578S
(en)
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1998-10-08 |
2000-09-05 |
Brady William J |
Rotary mining bit
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US6224302B1
(en)
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1999-02-10 |
2001-05-01 |
Cole Carbide Industries, Inc. |
Spade drill
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US6145606A
(en)
*
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1999-03-08 |
2000-11-14 |
Kennametal Inc. |
Cutting insert for roof drill bit
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USD424579S
(en)
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1999-05-10 |
2000-05-09 |
Brady William J |
Rotary mining bit
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US6595305B1
(en)
*
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2000-02-15 |
2003-07-22 |
Kennametal Inc. |
Drill bit, hard member, and bit body
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US6684968B2
(en)
*
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2001-06-25 |
2004-02-03 |
Kennametal Inc. |
Roof bit body and insert assembly
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USD487753S1
(en)
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2002-06-03 |
2004-03-23 |
The William J. Brady Loving Trust |
Over-reamer drill tool for pilot bit
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US7100714B1
(en)
*
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2002-09-13 |
2006-09-05 |
The Sollami Company |
Mine ceiling drill bit and blade
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US6966393B2
(en)
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2003-06-02 |
2005-11-22 |
The William J. Brady Loving Trust |
Drill drive steel
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US6915867B2
(en)
*
|
2003-06-30 |
2005-07-12 |
Kennametal Inc. |
Earth penetrating rotary drill bit with helical ports
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USD516104S1
(en)
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2004-04-27 |
2006-02-28 |
The William J. Brady Loving Trust |
Hard rock drill tool
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USD524333S1
(en)
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2004-04-27 |
2006-07-04 |
Brady William J |
Heavy duty hard rock drill tool
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US7228922B1
(en)
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2004-06-08 |
2007-06-12 |
Devall Donald L |
Drill bit
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USD514131S1
(en)
|
2004-07-08 |
2006-01-31 |
The William J. Brady Loving Trust |
Rock drilling tool with ovate cutters
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|
USD574403S1
(en)
|
2007-03-09 |
2008-08-05 |
The William J. Brady Loving Trust |
Hard rock percussion drill bit with paraboloid PCD inserts
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US8002054B2
(en)
*
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2009-01-26 |
2011-08-23 |
Kennametl Inc. |
Roof drill bit, roof drill bit body and hard cutting insert for roof drill bit
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AU326763S
(en)
*
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2009-06-19 |
2009-07-15 |
Sandvik Intellectual Property |
A drill tip
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