Inventor · disambiguated record
Willard L. Johnson
Also filed as: JOHNSON WILLARD L · JOHNSON WILLARD LEWIS
9 granted patents·175 citations·filing 1975–1989
90Inventor score
Top patents by PatentIndex Score
9 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
- 0747US4002441AWash section for air-cleaning deviceJOHNSON WILLARD LEWIS·Filed 1975·Granted Jan 11, 1977·13 cites·18 claims
- 0846US4966718ACross flow filter methodJOHNSON WILLARD L·Filed 1989·Granted Oct 30, 1990·13 cites·20 claims
- 0938US4176709AStack-type heat exchangerJOHNSON WILLARD L·Filed 1978·Granted Dec 4, 1979·6 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →