Assignee
NORTON HARTY COLLIERY ENG LTD
3 granted patents·23 citations·filing 1978–1979
Top patents by PatentIndex Score
3 records- 0163US4176749AMaterials separationNORTON HARTY COLLIERY ENG LTD·Filed 1978·Granted Dec 4, 1979·16 cites·21 claims
- 0237US4248702AStratifier discharge controlNORTON HARTY COLLIERY ENG LTD·Filed 1979·Granted Feb 3, 1981·5 cites·8 claims
- 0327US4264440AWashbox with conveyor dischargeNORTON HARTY COLLIERY ENG LTD·Filed 1979·Granted Apr 28, 1981·2 cites·4 claims
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