SOUTHERN PACIFIC TRANSPORTATION COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5032044 Light weight stowable front wheel seats for hauling large semistacked highway trucks in railroad cars of extraordinary heightExpiredApr 24, 90Jul 16, 91[B60P]
4880190 Locomotive curve tracking systemExpiredNov 18, 88Nov 14, 89[B61L]
4446734 Motor driven exciterExpiredJan 08, 82May 08, 84[B06B, G01N]
4429207 Method for welding railroad rails and means thereforExpiredDec 30, 81Jan 31, 84[B23K]
4293795 Solid state flasher relayExpiredJan 11, 80Oct 06, 81[H05B]
4237794 Automobile securement mechanism to freight carExpiredNov 14, 77Dec 09, 80[B65J, B61D, B60P]

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