Method of detecting unknown object and apparatus therefor
Patent 5081456 Issued on January 14, 1992. Estimated Expiration Date: 
January 14, 2009. 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 14, 2009. 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 3500395 3599211 3713156 3911435 Electromagnetic wave communication systems Patent #: 4064458 InventorsAssigneeApplicationNo. 180964 filed on 04/13/1988US Classes:342/22, TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE342/55, With television342/181, Color342/351Including a radiometerExaminersPrimary: Barron, Gilberto Jr.Attorney, Agent or FirmInternational ClassesG01S 013/89G01S 013/86 G01S 007/06 Foreign Application Priority Data1987-04-13 JPAbstractIn visualizing an unknown object possessed by a person to be checked, a narrow pulsating radio wave beam is scanned over the whole surface of the person to observe the intensity of a reflected radio wave at each scan point. The frequency of the radio wave beam is set at a frequency easy to be transmitted by the human body to suppress the reflection from the human body and emphasize the unknown object to thereby discriminate between them. An image of the person to be checked is displayed and the portion having a strong reflection is color-displayed on the image to allow the check of the unknown object possessed by the person without contacting the person.Other References
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