Assignee
PERLMAN WILLIAM
3 granted patents·120 citations·filing 1978–1985
Top patents by PatentIndex Score
3 records- 0182US4665990AMultiple-stage coal seam fracing methodPERLMAN WILLIAM·Filed 1985·Granted May 19, 1987·43 cites·30 claims
- 0280US4186802AFracing processPERLMAN WILLIAM·Filed 1978·Granted Feb 5, 1980·48 cites·23 claims
- 0363US4566539ACoal seam fracing methodPERLMAN WILLIAM·Filed 1984·Granted Jan 28, 1986·29 cites·34 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →