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| Number | Title | Issue Date |
| 5146216 | Multiple message signalling protocol for a selective call receiver A selective call receiver comprises circuitry for receiving a first signal having a first address and a first information format, and a second signal having a second address and a second information format; and a device for presenting a message comprising... | 09/08/1992 |
| 5140310 | Interrupting low battery indicator An electrical device has a display and a battery which has a varying electrical condition. The display typically displays information to be read by the user of the device. In response to a low battery detection, the information being displayed may be inte... | 08/18/1992 |
| 5140702 | Time based signal detector for operating in a presence search mode and absence search mode during peak times and off peak times A receiver capable of receiving a plurality of signals, wherein more of the signals are received at a peak time than at an off peak time, comprises the method of a first step for determining if the signals are being received by searching in a first search... | 08/18/1992 |
| 5093642 | Solid state mutually coupled inductor An electrical circuit (200) comprises a first circuit (208) constructed and arranged to simulate an inductor and a second circuit (210) constructed and arranged to simulate an inductor. Coupled to these circuits is a third circuit (212) for simulating a m... | 03/03/1992 |
| 5051740 | Paging terminal A paging terminal is provided for storing incoming pages during terminal downtime and subsequent transmission thereof.... | 09/24/1991 |
| 5051881 | Voltage multiplier A voltage multiplier selectively couples an input voltage potential (10) from a voltage source (Vin) to an energy storage device (22) in response to a first control circuit (18). A second switching circuit (26) is used to selectively serially couple the f... | 09/24/1991 |
| 5016326 | Belt clip A pager includes a belt clip for securing the pager to another object, and a leaf spring for attaching the belt clip and pager housing together while providing a decreasing force between the belt clip and pager housing as the belt clip is opened.... | 05/21/1991 |
| 5014071 | Ferrite rod antenna An antenna for coupling to a printed circuit board comprises a ferrite rod and an electrically conductive coil having at least one turn extending around the core. The ends of the coil form the antenna's leads and are bent to retain the core therebetween. ... | 05/07/1991 |
| 5010330 | Paging system employing designated frame commencing information service data message transmission A paging system which provides both individual and information services includes a transmitter which transmits page call address and data periodically in batches to subscribing paging receivers. Each batch comprising a synchronization code followed by a p... | 04/23/1991 |
| 5001471 | Paging system employing designated batch information service data message transmission A paging system which provides both individual and information services includes a transmitter for transmitting page call address and data periodically in batches, and a population of battery saver paging receivers for receiving the transmitted call infor... | 03/19/1991 |
| 4993973 | Battery contact A housing for receiving an energy source having first and second ends. The housing has a chamber for receiving the energy source in a first direction, a first contact positioned in the chamber and coupled to the housing for electrically contact the first ... | 02/19/1991 |
| 4977614 | Wristband with loop antenna An apparatus for adjusting the length of a single segment loop antenna while automatically compensating for the antenna so as to maintain a substantially constant resonant frequency thereof.... | 12/11/1990 |
| 4975694 | Paging receiver with variable color indicators A paging receiver has an indicator capable of illluminating in one of a plurality of colors. The color of illumination is selected in response to the address received by the pager. The indicator identifies the address by the color illuminated. The indicat... | 12/04/1990 |
| 4972508 | Housing for a battery powered device A housing for an electronic device powered by a battery, comprising a battery cover coupled to at least one of first and second interlocking portions for providing access to said battery and for securing said first and second interlocking portions.... | 11/20/1990 |
| 4961006 | Inductively loaded switching transistor circuit An inductively loaded switching transistor circuit for use in the DC-DC converter includes an inductive load and a switching transistor coupled to the inductive load for conducting current flowing therethrough when the switching transistor is on. A drive ... | 10/02/1990 |
| 4950931 | Vibrator A vibrator (2) comprising: a massive, magnetic member (16) arranged for movement about a reference position; and electromagnetic actuator means (12) for causing said member to move; and magnetic suspension means (8, 10) arranged on either side of said member f... | 08/21/1990 |
| 4931765 | Unitized housing for silent and tone pager alerting system A housing for an alerting system within a selective call radio receiver exhibits substantial space saving characteristics by incorporating both a low profile vibrator motor for silent alerting and a tone generator for audio alerting. The housing comprises... | 06/05/1990 |
| 4896805 | Certain improvements to a pager carrying case An improved carrying case for a small portable electronic device. The carrying case has a front panel, a back panel, two side panels and a bottom panel for defining a receptacle, open at its top, for closely receiving the device. A first flap at least par... | 01/30/1990 |
