This is an old revision of this page, as edited by Bayoustarwatch (talk | contribs) at 21:43, 2 March 2024 (thumb|Patented Oct. 6, 1931 1,826,501 UNITED STATES PATENT OFFICE BORNETT L. BOBROFF, OF MILWAUKEE, WISCONSIN SIGNALING SYSTEM Application filed July 11, 1927. Serial No. 204,892.|left|698x698px). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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