Inventor · disambiguated record
Paul D. Engdahl
Also filed as: ENGDAHL PAUL · ENGDAHL PAUL D
15 granted patents·1 pending application·265 citations·filing 1975–2006
93Inventor score
Top patents by PatentIndex Score
16 records- 0193US5209454AAutomatic safety shutoff valveENGDAHL PAUL D·Filed 1992·Granted May 11, 1993·95 cites·7 claims
- 0280US6112764AAutomatic safety shutoff valveENGDAHL PAUL D·Filed 1997·Granted Sep 5, 2000·40 cites·5 claims
- 0372USRE38220EEarthquake actuated automatic gas shutoff valveENGDAHL PAUL D·Filed 2002·Granted Aug 19, 2003·15 cites·12 claims
- 0467US6917004B1Earthquake actuated micro switchFiled 2004·Granted Jul 12, 2005·10 cites·20 claims
- 0566US7650901B2Ball seat levelerENGDAHL PAUL·Filed 2006·Granted Jan 26, 2010·6 cites·20 claims
- 0665US7152615B1Earthquake actuated horizontal valve with micro switchENGDAHL PAUL D·Filed 2004·Granted Dec 26, 2006·9 cites·15 claims
- 0763US5307699ASeismic initiator for earthquake shutoff valves and the likeENGDAHL PAUL D·Filed 1993·Granted May 3, 1994·22 cites·9 claims
- 0863US4630483APeak accelerographENGDAHL PAUL D·Filed 1985·Granted Dec 23, 1986·18 cites·8 claims
- 0951US3974504APeak accelerographENGDAHL PAUL D·Filed 1975·Granted Aug 10, 1976·9 cites·9 claims
- 1048US5144598AIntergrating, indicating, and controlling seismometerENGDAHL PAUL D·Filed 1991·Granted Sep 1, 1992·23 cites·17 claims
- 1142US6213142B1Earthquake actuated automatic gas shutoff valveFiled 1999·Granted Apr 10, 2001·9 cites·10 claims
- 1242US2008099072A1Horizontal valve ball seat levelerENGDAHL PAUL·Filed 2006·Application pending·0 cites
- 1340US4100807APeak-recording accelerometerENGDAHL PAUL D·Filed 1977·Granted Jul 18, 1978·5 cites·8 claims
- 1436US4223319APassive multielement shock recorderENGDAHL PAUL D·Filed 1978·Granted Sep 16, 1980·3 cites·11 claims
- 1529US4694304AEarthquake displacement recorderENGDAHL PAUL D·Filed 1986·Granted Sep 15, 1987·1 cites·11 claims
- 1628US4684958ASeismic displacement recorder for base-isolated structuresENGDAHL PAUL D·Filed 1986·Granted Aug 4, 1987·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →