Individual holder
ENGDAHL PAUL D
12 granted patents·240 citations·filing 1975–2004
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
12 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
- 0465US7152615B1Earthquake actuated horizontal valve with micro switchENGDAHL PAUL D·Filed 2004·Granted Dec 26, 2006·9 cites·15 claims
- 0563US5307699ASeismic initiator for earthquake shutoff valves and the likeENGDAHL PAUL D·Filed 1993·Granted May 3, 1994·22 cites·9 claims
- 0663US4630483APeak accelerographENGDAHL PAUL D·Filed 1985·Granted Dec 23, 1986·18 cites·8 claims
- 0751US3974504APeak accelerographENGDAHL PAUL D·Filed 1975·Granted Aug 10, 1976·9 cites·9 claims
- 0848US5144598AIntergrating, indicating, and controlling seismometerENGDAHL PAUL D·Filed 1991·Granted Sep 1, 1992·23 cites·17 claims
- 0940US4100807APeak-recording accelerometerENGDAHL PAUL D·Filed 1977·Granted Jul 18, 1978·5 cites·8 claims
- 1036US4223319APassive multielement shock recorderENGDAHL PAUL D·Filed 1978·Granted Sep 16, 1980·3 cites·11 claims
- 1129US4694304AEarthquake displacement recorderENGDAHL PAUL D·Filed 1986·Granted Sep 15, 1987·1 cites·11 claims
- 1228US4684958ASeismic displacement recorder for base-isolated structuresENGDAHL PAUL D·Filed 1986·Granted Aug 4, 1987·0 cites·10 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →