The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 16, 1977
Filed:
Oct. 16, 1975
James W Merrick, El Paso, TX (US);
Del Norte Technology, Inc., Euless, TX (US);
Abstract
A radar position locator system uses a mobile and at least two stationary transceivers. The signals are validated by being stored and compared with previously received signals. If the comparison indicates that the received signal is within a range of a reasonably possible change, as compared to the previously received signals, it is accepted. Otherwise, it is rejected and the memory circuit which stored the signal for validation is backed up to the last previously stored valid signal. The stationary transceivers function somewhat as a surveyor's bench mark. Each transceiver is individually identified by a coded stream of radar pulses, as, for example, a stream of pulses transmitted at a predetermined transceiver identifying pulse repetition rate. A selected number of validated radar signals are transmitted between the mobile and stationary transceivers. The round trip transmission times of several of these signals are averaged, and a digital read out indicates the distance represented by such averaging.