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Patent 4149224 Issued on April 10, 1979. Estimated Expiration Date: 
January 11, 1997. 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.
January 11, 1997. 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 1411167 3169022 3509527 Apparatus for the digital display or recording of data Patent #: 4017157 InventorsApplicationNo. 05/758466 filed on 01/11/1977US Classes:362/157, SELF POWERED LAMP340/565, Responsive to intruder energy340/666, Weight345/7, IMAGE SUPERPOSITION BY OPTICAL MEANS (E.G., HEADS-UP DISPLAY)362/23, ILLUMINATED SCALE OR DIAL362/458MISCELLANEOUSExaminersPrimary: Engle, Samuel W.Assistant: Palo, Ralph International ClassesF21V 33/00 (20060101)G08B 13/02 (20060101) G08B 5/00 (20060101) G08B 13/10 (20060101) AbstractA personal security device incorporated into a conventional flashlight for informing a person, by remote control means, who is outside the door of the house, and indicating by a picture, whether it is a man, woman or child, the picture appearing on a view screen of a unit mounted on the flashlight, so that a person is thus cautioned against opening the door, particularly if there is a man outside.Other References
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