Inventor · disambiguated record
Douglas A. Callison
Also filed as: CALLISON DOUGLAS A
5 granted patents·167 citations·filing 1983–1992
83Inventor score
Top patents by PatentIndex Score
5 records- 0187US4774823ATrailer hitch lockCALLISON DOUGLAS A·Filed 1987·Granted Oct 4, 1988·72 cites·11 claims
- 0268US4632361AScheduled fluid control valveCALLISON & ASSOCIATES LIMITED·Filed 1985·Granted Dec 30, 1986·34 cites·2 claims
- 0361US5283994ALandscape timber systemCALLISON & ASSOCIATES XXI INC·Filed 1992·Granted Feb 8, 1994·31 cites·12 claims
- 0455US5085404AStaple removing deviceDLT MFG·Filed 1989·Granted Feb 4, 1992·22 cites·4 claims
- 0540US4662397AScheduled fluid control valveCALLISON & ASSOCIATES LIMITED·Filed 1983·Granted May 5, 1987·8 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →