William Joseph Jarvis

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Bestwood, EN

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Patents Grantslast 30 patents

Information Patent Grant
Haulage arrangements for mineral mining machines
- Patent number 4,088,370
- Issue date May 9, 1978
- Coal Industry (Patents) Limited
- William J. Jarvis
- E21 - EARTH DRILLING MINING
Information Patent Grant
Longwall machine with captivating bracket
- Patent number 4,055,367
- Issue date Oct 25, 1977
- Coal Industry (Patents) Limited
- William Joseph Jarvis
- E21 - EARTH DRILLING MINING
Information Patent Grant
Track-mounted shoe-supported inclining mining machine
- Patent number 4,054,321
- Issue date Oct 18, 1977
- Coal Industry (Patents) Ltd.
- William Joseph Jarvis
- E21 - EARTH DRILLING MINING