Assignee
JOHNSON WILLARD L
8 granted patents·162 citations·filing 1978–1989
Top patents by PatentIndex Score
8 records- 0175US4790935AFilter leaf assembly with bonded spacer and sealerJOHNSON WILLARD L·Filed 1986·Granted Dec 13, 1988·41 cites·10 claims
- 0267US4519903AFilter machineJOHNSON WILLARD L·Filed 1983·Granted May 28, 1985·24 cites·20 claims
- 0358US4859332AFilter leaf cleaning jet apparatusJOHNSON WILLARD L·Filed 1987·Granted Aug 22, 1989·21 cites·23 claims
- 0457US4964987ACross flow filter apparatusJOHNSON WILLARD L·Filed 1988·Granted Oct 23, 1990·20 cites·14 claims
- 0557US4579656ALeaf-type filterJOHNSON WILLARD L·Filed 1985·Granted Apr 1, 1986·20 cites·7 claims
- 0653US4919805AVertical leaf filter flushJOHNSON WILLARD L·Filed 1988·Granted Apr 24, 1990·17 cites·5 claims
- 0746US4966718ACross flow filter methodJOHNSON WILLARD L·Filed 1989·Granted Oct 30, 1990·13 cites·20 claims
- 0838US4176709AStack-type heat exchangerJOHNSON WILLARD L·Filed 1978·Granted Dec 4, 1979·6 cites·10 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →