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| Number | Title | Issue Date |
| 5565846 | Reader system for waste bin pickup vehicles A reader for radio frequency identification tags having at least one magnetic field transmitting and receiving coil which is oriented in a given plane and which is responsive to a received magnetic exciter field of a first frequency to produce and radiate... | 10/15/1996 |
| 5420757 | Method of producing a radio frequency transponder with a molded environmentally sealed package A method of forming an environmentally sealed transponder type circuit wherein the circuit components are mounted on a lead type substrate frame, the components are encapsulated in a plastic housing in a plastic molding process so that the housing is supp... | 05/30/1995 |
| 5382952 | Transponder for proximity identification system A transponder for use in an object identification system including an interrogator which transmits a continuous interrogation signal and detects a responsive identification signal transmitted by the transponder. The transponder receives and detects the in... | 01/17/1995 |
| 5382784 | Hand-held dual technology identification tag reading head A hand-held dual reading head including a hand-held housing having a light transmissive window at one end thereof; and containing an actuatable bar-code reader, which produces a light beam which exits the housing via the window and detects light from the ... | 01/17/1995 |
| 5378880 | Housing structure for an access control RFID reader A radio frequency proximity reader has a base plate housing portion that has an essentially rectangular shape with first and second opposed major surfaces and a centrally located bore. A cylindrical housing portion having a concentrically placed bore is a... | 01/03/1995 |
| 5221831 | Flap-type portal reader Apparatus for selectively reading or writing data on a magnetic data stripe on a data card which is thin and flexible and for selectively returning or capturing the card. The apparatus includes a card guide arrangement comprising a cylindrical card guide ... | 06/22/1993 |
| 5099227 | Proximity detecting apparatus A proximity detection system which combines the advantages of an electrostatic (electric) field coupling mechanism with those of an electromagnetic coupling mechanism in order to overcome the disadvantages of the respective individual coupling mechanisms.... | 03/24/1992 |
| 4818855 | Identification system A remotely powered portable member having circuitry for storing and transmitting coded information. A first coupling device is provided for receiving a signal transmitted via one of a magnetic field and an electric field. A power circuit is connected to t... | 04/04/1989 |
