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| Number | Title | Issue Date |
| 7218623 | Coded reverse link messages for closed-loop power control of forward link control messages Multiple field units in a CDMA system are synchronized for communication with a base station using shared forward and reverse link channels. In an illustrative embodiment, each field unit is assigned a time slot in a forward link channel to receive messages from the... | 05/15/2007 |
| 7133395 | Multiple access bandwidth-on-demand using MSPK with an embedded tracking channel A communications system comprising a central node, at least one remote node and a communications link. The remote node is adapted to receive information transmitted from the central node over a broadcast link and the communications link is adapted to convey informat... | 11/07/2006 |
| 6759951 | Method and system for communicating among a plurality of mobile assets A method and system for a lead mobile asset to verify that a remote mobile asset under the control of the lead mobile asset is following a set of command functions broadcast by the lead mobile asset in a command message. The lead and remote mobile assets may be part... | 07/06/2004 |
| 6737966 | Keypad annunciator graphical user interface A Keypad Annunciator Graphical User Interface, (KAGUI), for use by an operator of a process control system for presenting and responding to alarm state data generated by the process control system, is disclosed. The KAGUI provides an interactive display of a keypad ... | 05/18/2004 |
| 6510315 | Systems and methods for maintaining the voice path connection during caller disconnect of an emergency 911 call In one embodiment of the invention, either a CPRU or an RNC in a wireless local loop performs digit analysis to identify whether an emergency 911 call is in progress by setting an internal indicator. When the emergency 911 caller goes on-hook during an em... | 01/21/2003 |
| 4652859 | Alarm reporting system An alarm system for monitoring alarm conditions and for generating alert signals responsive thereto. The alarm system includes alarm signal processing circuitry for generating signals responsive to alarm conditions, control circuitry coupled to both trans... | 03/24/1987 |
| 4642477 | Automatic light signalling system An alarm actuated emergency light signalling circuit to replace the usual wall mounted light switch. The new switch circuit fits within the electrical wall box and has the external appearance and manual operation of an ordinary light switch. When triggere... | 02/10/1987 |
| 4282517 | Automatic ringback for direct current monitoring system A ringback circuit in a security protection system, of the type which monitors a dc current, automatically reports to remote premises that the central station has, at an appropriate time, received an indication that the dc current has been changed to the ... | 08/04/1981 |
| 4203095 | Monitoring apparatus for direct wire alarm system For monitoring the supervisory current in a communications line between a power source and a protected premises which forms a security protection circuit, monitoring apparatus utilizes sensitive solid state circuitry which appears transparent to the prote... | 05/13/1980 |
| 4162488 | Alarm system An alarm system is disclosed which utilizes the Bell System DATAPHONE (a registered service mark of AT&T Company) Select-A-Station Service equipment to communicate alarm messages from a plurality of protected premises to a central monitoring station. The ... | 07/24/1979 |
| 4129860 | Apparatus for forming a character by a matrix pattern of picture elements An apparatus for forming a character in which picture elements as indication elements are formed in the shape of a matrix to create a character, such as a letter, a numeral, a symbol or the like, in this case the magnifications of the character in both a ... | 12/12/1978 |
| 4126849 | Elevator call circuit A call button replacement circuit includes a controllable solid state switch that has a control terminal and a two-terminal output circuit, a manually operated switch, an indicator device, and a capacitor. The solid state switch is connected in circuit be... | 11/21/1978 |
| 3942166 | Fault detection and signaling system A fault detection and signaling system is responsive to a fault detection to generate a first type of warning signal indicative of fault detection and includes means operable to indicate that a fault is "acknowledged" and for causing the generation of a s... | 03/02/1976 |
