Vehicle marker light
Patent 4654629 Issued on March 31, 1987. Estimated Expiration Date: 
July 2, 2005. 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.
July 2, 2005. 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 ReferencesInventorsAssigneeApplicationNo. 06/751221 filed on 07/02/1985US Classes:246/473.3, Light beam projecting257/88, Plural light emitting devices (e.g., matrix, 7-segment array)257/99, With housing or contact structure315/200A, Flashers340/331, Periodic or flashing340/641, Signalling light element340/815.45, Using light emitting diodes345/46, Light-emitting diodes362/800LIGHT EMITTING DIODEExaminersPrimary: Crosland, Donnie L.Attorney, Agent or FirmInternational ClassB60Q 1/26 (20060101)AbstractA marker light using an array (2) of light emitting diodes (12) in combination with lenses (3) provides a light beam of required intensity, shape and color for railroad applications. The light emitting diodes are arranged in various configurations to form the array (2). The lenses may be Fresnel lenses. Control circuitry (C) energizes the light emitting diodes at predetermined or variable flashing rates. Sensing circuitry (222) senses the failure of light emitting diodes in the array and provides an indication of such failure. | |
