Inventor · disambiguated record
David E. Steffen
Also filed as: STEFFEN DAVID E · STEFFEN DAVID EUGENE
10 granted patents·340 citations·filing 1974–1997
92Inventor score
Files withDICKEY JOHN CORP10
Top patents by PatentIndex Score
10 records- 0192US4166948ASeed sensorDICKEY JOHN CORP·Filed 1977·Granted Sep 4, 1979·39 cites·5 claims
- 0291US4277833APlanter population monitorDICKEY JOHN CORP·Filed 1979·Granted Jul 7, 1981·57 cites·13 claims
- 0391US4225930APlanter population monitorDICKEY JOHN CORP·Filed 1978·Granted Sep 30, 1980·55 cites·24 claims
- 0486US4085862AAutomatically controlled seed planterDICKEY JOHN CORP·Filed 1976·Granted Apr 25, 1978·43 cites·19 claims
- 0585US4555624AHigh rate seed sensorDICKEY JOHN CORP·Filed 1983·Granted Nov 26, 1985·67 cites·15 claims
- 0683US4307390ACorn and soybean sensorDICKEY JOHN CORP·Filed 1979·Granted Dec 22, 1981·29 cites·13 claims
- 0775US3974377ASolid state seed sensorDICKEY JOHN CORP·Filed 1974·Granted Aug 10, 1976·20 cites·17 claims
- 0867US4137529ACalibrated tuneable monitorDICKEY JOHN CORP·Filed 1974·Granted Jan 30, 1979·14 cites·8 claims
- 0941US5819512AApparatus and method for sensing material build-upDICKEY JOHN CORP·Filed 1997·Granted Oct 13, 1998·12 cites·7 claims
- 1028US4262288AElectronic disabling switchDICKEY JOHN CORP·Filed 1974·Granted Apr 14, 1981·4 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →