Inventor · disambiguated record
Roger P. Engdahl
Also filed as: ENGDAHL ROGER · ENGDAHL ROGER P
8 granted patents·300 citations·filing 1982–1997
89Inventor score
Top patents by PatentIndex Score
8 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
- 0373US5617471ATelecommunications system for transferring a telephone callFiled 1995·Granted Apr 1, 1997·67 cites·14 claims
- 0465US6330323B1Enhanced overflow call processingMCI COMMUNICATIONS CORP·Filed 1996·Granted Dec 11, 2001·36 cites·14 claims
- 0563US5307699ASeismic initiator for earthquake shutoff valves and the likeENGDAHL PAUL D·Filed 1993·Granted May 3, 1994·22 cites·9 claims
- 0660US4524700AOpening cover for railroad carsPROFORM INC·Filed 1982·Granted Jun 25, 1985·17 cites·7 claims
- 0748US5144598AIntergrating, indicating, and controlling seismometerENGDAHL PAUL D·Filed 1991·Granted Sep 1, 1992·23 cites·17 claims
- 0828US4684958ASeismic 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 →