Minroc Technical Promotions Limited

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit assembly for fluid-operated percussion drill tools
- Patent number 7,987,930
- Issue date Aug 2, 2011
- Minroc Technical Promotions Limited
- Joseph Purcell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill bit assembly for fluid-operated percussion drill tools
- Patent number 7,975,784
- Issue date Jul 12, 2011
- Minroc Technical Promotions Limited
- Joseph Purcell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Percussion hammer for enlarging drilled holes
- Patent number 7,735,584
- Issue date Jun 15, 2010
- Minroc Technical Promotions Limited
- Joseph Purcell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Segmented ring mounting for a fluid-operated percussion drill tool
- Patent number 6,290,424
- Issue date Sep 18, 2001
- Minroc Technical Promotions Ltd.
- Joseph Purcell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation down-the-hole drill
- Patent number 5,685,380
- Issue date Nov 11, 1997
- Minroc Technical Promotions Limited
- Joseph Purcell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reverse circulation down-the-hole hammer drill and bit therefor
- Patent number 4,819,746
- Issue date Apr 11, 1989
- Minroc Technical Promotions Ltd.
- John C. A. T. Brown
- E21 - EARTH DRILLING MINING
Information Patent Grant
Valveless down-the-hole drill
- Patent number 4,790,390
- Issue date Dec 13, 1988
- Minroc Technical Promotions Ltd.
- Peter J. Sweeny
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

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Patents Applicationslast 30 patents

Information Patent Application
Drill bit assembly for fluid-operated percussion drill tools
- Publication number 20100108395
- Publication date May 6, 2010
- Minroc Technical Promotions Limited
- Joseph Purcell
- E21 - EARTH DRILLING MINING

Minroc Technical Promotions Limited

Organization

Patents Grantslast 30 patents

Drill bit assembly for fluid-operated percussion drill tools

Drill bit assembly for fluid-operated percussion drill tools

Percussion hammer for enlarging drilled holes

Segmented ring mounting for a fluid-operated percussion drill tool

Reverse circulation down-the-hole drill

Reverse circulation down-the-hole hammer drill and bit therefor

Valveless down-the-hole drill

Patents Applicationslast 30 patents

Drill bit assembly for fluid-operated percussion drill tools