Assignee
WESTERN ROCK BIT CO LTD
CA·8 granted patents·274 citations·filing 1974–1991
Top patents by PatentIndex Score
8 records- 0197US3945681ACutter assemblyWESTERN ROCK BIT CO LTD·Filed 1974·Granted Mar 23, 1976·173 cites·11 claims
- 0270US4051912APercussion drill bitWESTERN ROCK BIT CO LTD·Filed 1976·Granted Oct 4, 1977·27 cites·7 claims
- 0352US5186267AJournal bearing type rock bitWESTERN ROCK BIT CO LTD·Filed 1991·Granted Feb 16, 1993·25 cites·11 claims
- 0450US5183123AIndicating means for a rock bit lubricating systemWESTERN ROCK BIT CO LTD·Filed 1991·Granted Feb 2, 1993·22 cites·10 claims
- 0538US3995706AEarth auger drillWESTERN ROCK BIT CO LTD·Filed 1975·Granted Dec 7, 1976·8 cites·4 claims
- 0637US4572589AJournal bearingWESTERN ROCK BIT CO LTD·Filed 1985·Granted Feb 25, 1986·10 cites·10 claims
- 0734US4086713ADigger tooth retainerWESTERN ROCK BIT CO LTD·Filed 1977·Granted May 2, 1978·3 cites·3 claims
- 0832US5016719ARotary cone type rock bitsWESTERN ROCK BIT CO LTD·Filed 1990·Granted May 21, 1991·6 cites·8 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →