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| Number | Title | Issue Date |
| 7407111 | Surface acoustic wave identification tag having enhanced data content and methods of operation and manufacture thereof A surface acoustic wave (SAW) identification tag and methods of operating and manufacturing the tag. In one embodiment, the tag includes: (1) a piezoelectric substrate having a SAW transducer located thereon, (2) a group of slots arranged by both pulse position and ... | 08/05/2008 |
| 7173360 | Single phase undirectional surface acoustic wave transducer and improved reflectors A unidirectional transducer for a surface acoustic wave (SAW) device. In one embodiment the device includes (1) a defined area on a piezoelectric substrate within which is located an open circuit reflector perpendicular to the SAW direction of propagation; and a pai... | 02/06/2007 |
| 7103948 | Method of manufacturing piezoelectric wafers of saw identification tags The invention provides a method of manufacturing piezoelectric wafers of surface acoustic wave (SAW) identification tags. In one embodiment, the method includes: (1) using a master reticle to form, on each of the piezoelectric wafers, wafer-independent patterns that... | 09/12/2006 |
| 7096279 | Object-naming network infrastructure for identification tags and method of operation thereof An object-naming network infrastructure and a method of responding to queries for object names. In one embodiment, the infrastructure includes: (1) a central object name server coupled to a computer network and constituting a first hierarchical level and (2) periphe... | 08/22/2006 |
| 7084768 | Anti-collision interrogation pulse focusing system for use with multiple surface acoustic wave identification tags and method of operation thereof The present invention provides a system for avoiding code collisions from multiple SAW identification tags and a method of operating such system. In one embodiment the invention provides for (1) focusing an interrogation pulse to within a defined space; and (2) disc... | 08/01/2006 |
| 7030762 | Anti-collision interrogation pulse focusing system for use with multiple surface acoustic wave identification tags and method of operation thereof The present invention provides a system for avoiding code collisions from multiple SAW identification tags and a method of operating such system. In one embodiment the invention provides for (1) focusing an interrogation pulse to within a defined space; and (2) disc... | 04/18/2006 |
| 6958696 | Transfer function system for determining an identifier on a surface acoustic wave identification tag and method of operating the same A transfer function system for determining an identifier on a surface acoustic wave (SAW) identification tag and a method of operating the same. In one embodiment the system provides for (1) generating a radio frequency (RF) interrogation signal that causes a transd... | 10/25/2005 |
| 6919802 | Multi-layer method of accommodating code collisions from multiple surface acoustic wave identification tags A method of accommodating code collisions from multiple SAW identification tag coded response pulses. In one embodiment, the method includes: (1) separating probable candidates by time-domain; (2) classifying the probable candidates by code-division separation; (3) ... | 07/19/2005 |
| 6759789 | Surface acoustic wave identification tag having an interdigital transducer adapted for code discrimination and methods of operation and manufacture thereof A surface acoustic wave (SAW) identification tag having a coded transducer and methods of operating and manufacturing the tag. In one embodiment the tag includes: (1) a piezoelectric substrate having a number of reflectors distributed among a group of slots arranged... | 07/06/2004 |
