David M. Parkes

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Wet belt conveyor
- Patent number 4,068,755
- Issue date Jan 17, 1978
- Kaiser Resources, Limited
- David M. Parkes
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Hydraulic mining apparatus and method
- Patent number 4,061,398
- Issue date Dec 6, 1977
- Kaiser Resources Ltd.
- David M. Parkes
- E21 - EARTH DRILLING MINING
Information Patent Grant
Pumpable product hydraulic mining apparatus and method
- Patent number 4,045,086
- Issue date Aug 30, 1977
- Kaiser Resources Ltd.
- David M. Parkes
- E21 - EARTH DRILLING MINING