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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7696881 | RFID systems and methods employing infrared localization A series of radio frequency identification (RFID) systems are delineated. An RFID system comprises an RFID signpost having a transmitter for transmitting signals of a predefined type, and a receiver for receiving signals of the predefined type, wherein the transmitt... | 04/13/2010 |
| 7253729 | Wireless vending communication systems A system includes a plurality of vending machines communicating wirelessly with a centralized consolidation unit. The consolidation unit communicates via a pre-established communications network, such as a wired or wireless telephone network with a data collection c... | 08/07/2007 |
| 7049933 | Identification device detection using multiple signal combination A method for determining whether an radio frequency identification (RFID) device is detected, includes: (a) selecting a plurality of different antenna patterns from a predetermined multiplicity of antenna patterns; (b) determining a plurality of binary results; (c) ... | 05/23/2006 |
| 7030731 | Wireless identification systems and protocols Monitoring systems and protocols are disclosed that are flexible in mode operation and format depending on the environment in which they are used. Such monitoring systems and protocols are able to change their utilization automatically, or by received instruction to... | 04/18/2006 |
| 6982646 | Object identification system with adaptive transceivers and methods of operation An object identification system includes a monitor and a plurality of transceivers that communicate over a common medium. The monitor includes a first transmitter, a first receiver, and a processor. Each transceiver includes a resonant circuit, a transmitter, a rece... | 01/03/2006 |
| 6831562 | Object identification system with adaptive transceivers and methods of operation An object identification system includes a monitor and a plurality of transceivers that communicate over a common medium. The monitor includes a first transmitter, a first receiver, and a processor. Each transceiver includes a resonant circuit, a transmitter, a rece... | 12/14/2004 |
| 6621410 | System for item and orientation identification A system includes an identification circuit, a grid antenna, a receiver, and a processor. The identification circuit includes resonant circuits formed on a substrate within a perimeter. Identification may be based on a quantity or physical arrangement of ... | 09/16/2003 |
| 6552661 | Zone based radio frequency identification A locator according to various aspects of the present invention includes a receiver and a processor. The receiver receives several signals, each signal having respective indicia of identification device presence within a respective communication pattern. ... | 04/22/2003 |
| 6362737 | Object Identification system with adaptive transceivers and methods of operation An object identification system includes a monitor and a plurality of transceivers that communicate over a common medium. The monitor includes a first transmitter, a first receiver, and a processor. Each transceiver includes a resonant circuit, a transmit... | 03/26/2002 |
| 6351215 | Monitoring antenna system A monitoring system incorporates antennas that transmit signals at predetermined frequencies; the transmitted signals are received by tags located in the active monitoring area of the antenna which then transmit signals back to the antenna. The antennas a... | 02/26/2002 |
| 6340932 | Carrier with antenna for radio frequency identification A carrier, as used for example to transport several radio frequency identification devices, includes a circuit having an antenna and a series capacitor for tuning the antenna. Enhanced transceiver communication results when transceivers are placed in the ... | 01/22/2002 |
