Assignee
SEVERSON FREDERICK E
US·8 granted patents·3 pending applications·196 citations·filing 1987–2012
Top patents by PatentIndex Score
11 records- 0195US8070108B2Signaling and remote control train operationSEVERSON FREDERICK E·Filed 2010·Granted Dec 6, 2011·18 cites·11 claims
- 0291US5267318AModel railroad cattle car sound effectsSEVERSON FREDERICK E·Filed 1990·Granted Nov 30, 1993·64 cites·23 claims
- 0388US7429931B2Proximity control of on-board processor-based model train sound and control systemSEVERSON FREDERICK E·Filed 2005·Granted Sep 30, 2008·13 cites·19 claims
- 0484US8408143B2Sound systems for model railroad locomotivesSEVERSON FREDERICK E·Filed 2012·Granted Apr 2, 2013·5 cites·8 claims
- 0583US4914431AElectronic control system for model railroadsSEVERSON FREDERICK E·Filed 1987·Granted Apr 3, 1990·56 cites·30 claims
- 0675USRE42284ESignaling techniques for DC track powered model railroadsSEVERSON FREDERICK E·Filed 2007·Granted Apr 12, 2011·9 cites·270 claims
- 0766US8166887B2Sound systems for model railroad locomotivesSEVERSON FREDERICK E·Filed 2011·Granted May 1, 2012·1 cites·4 claims
- 0864US5184048AModel railroad reversing motor control systemSEVERSON FREDERICK E·Filed 1990·Granted Feb 2, 1993·30 cites·13 claims
- 0958US2013190952A1Signaling and remote control train operationSEVERSON FREDERICK E·Filed 2012·Application pending·0 cites
- 1057US2007001058A1Model railroad control and sound systemsSEVERSON FREDERICK E·Filed 2006·Application pending·0 cites
- 1156US2012016542A1Signaling and remote control train operationSEVERSON FREDERICK E·Filed 2011·Application pending·0 cites
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →