W.C. PURSLEY LIMITED

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4517777 Trenchduct side member extrusion adapted for multiple positioning of cover plateExpiredMar 07, 83May 21, 85[E04F]
4404779 Trenchduct construction having adjustable lid-supporting meansExpiredApr 16, 81Sep 20, 83[E04B, E04F]
4252989 Adjustable service columnExpiredMay 25, 77Feb 24, 81[H02G]

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