Inventor · disambiguated record
David Ritchie
Also filed as: RITCHIE DAVID · RITCHIE DAVID E
3 granted patents·47 citations·filing 1984–2006
70Inventor score
Top patents by PatentIndex Score
3 records- 0183US7952564B2Multiple-touch sensorHURST G SAMUEL·Filed 2006·Granted May 31, 2011·28 cites·27 claims
- 0250US4565208ASeismic shut-off valveRITCHIE DAVID E·Filed 1984·Granted Jan 21, 1986·17 cites·23 claims
- 0332USD287871SSeismic gas shut-off valveRITCHIE DAVID E·Filed 1984·Granted Jan 20, 1987·2 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →