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:
Apr. 08, 1997
Filed:
Jun. 14, 1994
Raymond F Ayala, San Diego, CA (US);
Logicon, Inc., Torrence, CA (US);
Abstract
An electronic meter reader having a transmitter and antenna for inductively transmitting alternating current power in any selected one of a plurality of frequencies. The reader further includes a receiver for inductively receiving meter reading data from the meter being read represented by a load modulation of the transmitted frequency. A bandpass filter limits the bandwidth of the modulation frequency. The power transmitted by the transmitter may also be used by the meter to generate and transmit data representative of the meter reading back to the reader. A second receiver is also provided for inductively receiving reading data from the meter in the form of a modulated frequency generated by the meter. The reader includes a microprocessor and program which control the generation of a plurality of interrogation signal formats, and which decode a plurality of received data formats.