Inventor · disambiguated record
Darrell C. Symonds
Also filed as: SYMONDS DARRELL · SYMONDS DARRELL C
7 granted patents·68 citations·filing 1979–1993
84Inventor score
Top patents by PatentIndex Score
7 records- 0182USD267320SBlade ploughSYMONDS DARRELL C·Filed 1979·Granted Dec 21, 1982·18 cites·1 claims
- 0261US4796939ALifting meansCORSLING INC·Filed 1987·Granted Jan 10, 1989·21 cites·10 claims
- 0357US5437336AMethod and apparatus for creating an advantageous growing zone in a soilbed having a topsoil stratum and a hardpan stratumFiled 1993·Granted Aug 1, 1995·17 cites·33 claims
- 0432US4815545ASubsoil blade ploughsSYMONDS DARRELL C·Filed 1986·Granted Mar 28, 1989·4 cites·1 claims
- 0529US4974681AMethod for fracturing sub-surface hardpan by drawing a particularly-angled tine therethroughSYMONDS DARRELL C·Filed 1988·Granted Dec 4, 1990·3 cites·3 claims
- 0627US4800713ARotary rakesSYMONDS DARRELL C·Filed 1987·Granted Jan 31, 1989·3 cites·4 claims
- 0726US4821499ARotary rakesSYMONDS DARRELL C·Filed 1988·Granted Apr 18, 1989·2 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →