Position indicating system
Patent 5506587 Issued on April 9, 1996. Estimated Expiration Date: 
December 23, 2013. 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.
December 23, 2013. 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 3566404 Universal dynamic navigation, surveillance, emergency location, and collision avoidance system and method GPS-based anti-collision warning system Method for sequential data transmission Patent #: 5367524 InventorAssigneeApplicationNo. 170167 filed on 12/23/1993US Classes:342/357.09, With transmission of location-indicative information to or from a remote station342/386, With transmisson of bearing or position determinative signals342/454, Traffic370/321Time division (TDMA)ExaminersPrimary: Issing, Gregory C.Attorney, Agent or FirmInternational ClassesG01S 005/02G01S 001/08 H04J 003/12 H04J 003/24 Foreign Application Priority Data1991-07-01 SEAbstractA plurality of movable objects, such as aircraft, are provided with GPS receivers, enabling the individual determination of longitude and latitude. Further, the receiver also receives a very precise time base from the GPS satellites. This very precise time base is used to enable all of the plurality of movable objects to transmit in a predetermined radio frequency their identities and positions in precisely determined time blocks. By limiting the range of the frequencies used by the movable objects to transmit, the range of receivability is limited, such that the system may be implemented as a worldwide overlapping mosaic. The transmissions of each movable object may be received by all of the plurality of movable objects, as well as by air traffic monitoring centers on the ground. | |
