B61L 1/06

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9457819 Method and apparatus for locating rail vehiclesJul 23, 13Oct 04, 16SIEMENS AKTIENGESELLSCHAFT
9061691 Method and apparatus for operation of a railway branch lineDec 09, 11Jun 23, 15SIEMENS AKTIENGESELLSCHAFT
5265831 Arrangement for detecting an object by means of sound conducted through a solid body and method of using such arrangementSep 09, 91Nov 30, 93Not available