John Elsby

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Lemming, AU

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Patents Grantslast 30 patents

Information Patent Grant
Drilling apparatus
- Patent number 6,702,045
- Issue date Mar 9, 2004
- Azuko Party Ltd
- John Elsby
- E21 - EARTH DRILLING MINING
Information Patent Grant
Transmission sleeve for a down hole hammer
- Patent number RE36002
- Issue date Dec 22, 1998
- SDS Digger Tools PTY, Ltd.
- John Elsby
- 175 - Boring or penetrating the earth
Information Patent Grant
Transmission sleeve for a down hole hammer
- Patent number 5,154,244
- Issue date Oct 13, 1992
- D.T.A. PTY Ltd
- John Elsby
- E21 - EARTH DRILLING MINING
Information Patent Grant
Compensating ring for a down hole hammer
- Patent number 5,085,285
- Issue date Feb 4, 1992
- D.T.A. Pty. Ltd.
- John Elsby
- E21 - EARTH DRILLING MINING