Metal tactile edge-warning strip
Patent 5217319 Issued on June 8, 1993. Estimated Expiration Date: 
May 24, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 24, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1696510 1698594 1932206 2031396 Universal traffic control marker Metal strip for preventing invasion Bipedal guidance system and method Mobility guide tile for visually handicapped Display surface for tactile information Patent #: 5086287 InventorAssigneeApplicationNo. 705124 filed on 05/24/1991US Classes:404/15, Vibration inducing member (e.g., road stud, speed bump)340/407.1, TACTUAL INDICATION434/113Tactile reading aid (e.g., Braille, etc.)ExaminersPrimary: Bui, Thuy M.Assistant: Schoeppel, Roger J. Attorney, Agent or FirmForeign Patent References
International ClassE01F 011/00AbstractA tactile edge-warning strip made from a sheet-metal strip having a series of projections formed in the strip to present an uneven surface for tactile feedback. The upper surface is covered with a roughened coating to inhibit slipping. The strip further includes an angled strip edge portion for anchoring the strip edge into the surface to which it is fixed to inhibit lifting of the strip from the surface.Other References
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