Assignee
GRAPPONE TECHNOLOGIES INC
US·2 granted patents·37 citations·filing 2002–2013
Technology mixB61L2
Top patents by PatentIndex Score
2 records- 0164US6655639B2Broken rail detector for communications-based train control and positive train control applicationsGRAPPONE TECHNOLOGIES INC·Filed 2002·Granted Dec 2, 2003·34 cites·32 claims
- 0260US9150228B2Track circuit providing enhanced broken rail detectionGRAPPONE TECHNOLOGIES INC·Filed 2013·Granted Oct 6, 2015·3 cites·6 claims
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