Assignee
WORLD OIL MINING LTD
5 granted patents·69 citations·filing 1974–1975
Top patents by PatentIndex Score
5 records- 0188US3960408ATunnel layout for longwall mining using shieldsWORLD OIL MINING LTD·Filed 1975·Granted Jun 1, 1976·40 cites·6 claims
- 0261US3958830ALongwall mining system and archshield for mining tar sands, oil shales and the likeWORLD OIL MINING LTD·Filed 1974·Granted May 25, 1976·19 cites·32 claims
- 0347US3980340AMethod for longwall mining with side-by-side arch sectionsWORLD OIL MINING LTD·Filed 1975·Granted Sep 14, 1976·6 cites·8 claims
- 0437US4013320AHook plough apparatus for longwall miningWORLD OIL MINING LTD·Filed 1975·Granted Mar 22, 1977·3 cites·21 claims
- 0529US3954300AMining machine longwall propulsion meansWORLD OIL MINING LTD·Filed 1975·Granted May 4, 1976·1 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →