John Porritt

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Picton, CA

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Patents Grantslast 30 patents

Information Patent Grant
Convertible vibratory or rotary core drill apparatus
- Patent number 5,058,688
- Issue date Oct 22, 1991
- Meta-Probe Inc.
- Hugh Scott
- E21 - EARTH DRILLING MINING
Information Patent Grant
Vibratory core drill apparatus for the recovery of soil or sediment...
- Patent number 5,004,055
- Issue date Apr 2, 1991
- Meta-Probe Inc.
- John Porritt
- E21 - EARTH DRILLING MINING