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:
Mar. 31, 1998
Filed:
Nov. 28, 1994
William J Skudera, Jr, Oceanport, NJ (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
Passive recognition tags are disclosed that function along with a transceiver and a processor in a system which identifies distant items. Each tag includes a SAW substrate on which sync and tap transducers are commonly connected between positive and negative buses across which an interrogating signal is applied through an antenna. In response to that signal, in phase identification code signals pass to the antenna from both the sync transducer and the tap transducers. Transducer spacing is minimized relative to acoustic reflection considerations by disposing the tap transducers in a plurality of channels which are aligned in parallel across the width of the substrate on both output sides of the sync transducer.