U-S Safety Trolley Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5449056 Electric power distribution systemExpiredNov 23, 93Sep 12, 95[B60L, B60M]
4550231 Trolley railExpiredSep 22, 83Oct 29, 85[H01R, B60M]
4400592 Electric power transmission systemExpiredAug 10, 81Aug 23, 83[B60L]
4258835 Trolley rail sectionExpiredNov 13, 79Mar 31, 81[B60M]

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