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| Number | Title | Issue Date |
| 7146450 | Control and supervisory signal transmission system for changing a duty factor of a control signal A parent station output section changes a duty factor between a period in which a control data signal is at a level (high-potential low-level) lower than a power supply voltage Vx but higher than high-level signal in other circuit portions and a subsequent period in... | 12/05/2006 |
| 7003327 | Heuristically assisted user interface for a wireless communication device A method and apparatus for implementing a heuristic user interface for a mobile device that assists a user with the management and utilization of contact identifiers (e.g. phone numbers, facsimile numbers, email addresses and uniform resource identifiers (URIs)). Co... | 02/21/2006 |
| 6472999 | Apparatus and method for remote convenience message reception with signal strength determination An apparatus (14) and an associated method determine signal strength of a received electromagnetic signal (18) that is comprised of a plurality of pulses that convey a remote convenience function request, and which causes performance of the requested func... | 10/29/2002 |
| 5838249 | Control/supervisory signal transmission/reception system A control/supervisory signal transmission/reception system includes a central station and a number of local stations which are interconnected by a common data line carrying a three-level voltage signal so as to transfer data signals between the central an... | 11/17/1998 |
| 5509029 | Serial data transmissions device and terminal unit for the same A serial data transmission device has a master unit, plural terminal units, and an abnormal detection unit connected by a signal line. Each terminal unit has an allocated address. The master unit interchanges data with each one of the plural terminal unit... | 04/16/1996 |
| 5223826 | Control/supervisory signal transmission system A bidirectional control/supervisory system for transmitting control signals from a controller to devices and transmitting supervisory signals from sensors monitoring the devices to the controller through a common transmission line. A transmission/receptio... | 06/29/1993 |
| 4885568 | Integrated alarm transponder A time multiplexed integrated alarm contact for reporting detected alarm conditions to a system controller in a hardwired alarm system and wherein distinguishable binary frequencies are used for synchronizing/responding and for programming the contact. Du... | 12/05/1989 |
| 4679192 | Arrangement for transmitting digital data For the orderly transmission of digital data between stations S1 -Sn connected to a common communication path B, it is useful to provide an access and addressing procedure. According to the invention, a main station MS which is also ... | 07/07/1987 |
| 4672374 | System for bilateral communication of a command station with remotely located sensors and actuators A remote sensing and control system wherein a plurality of remote sensing units are connected to a central control and monitoring console by only four interconnecting wires. A clock signal is converted to a plurality of parallel address signals at the loc... | 06/09/1987 |
| 4639912 | Signal transmission apparatus A signal transmission apparatus from a control unit to a plurality of memory units which correspond to signal terminal means and which are connected in series with each other, wherein the memory units at the starting end and at the final end are connected... | 01/27/1987 |
| 4559536 | Data transmission device A data transmission device having a plurality of monitor units which are wire connected in series to a computer. During a working cycle, one unit after the other is activated by emission of clock pulses from the computer. The clock pulses are counted in a... | 12/17/1985 |
| 4558316 | Electrical supervisory control and data acquisition system An electrical control system which comprises: a master station (2) and a plurality of receiver stations (4) connected thereto by a bus, (6), the master station including generating means (20, 22) for generating control signals (18) which are applied to sa... | 12/10/1985 |
| 4451826 | Single transmission line data acquisition system A single transmission line interrogated multiple channel data acquisition system is provided in which a plurality of remote station/sensors monitor specific process variables and transmit measurement values over the single transmission line to a master st... | 05/29/1984 |
| 4393461 | Communications subsystem having a self-latching data monitor and storage device A communications subsystem having a microprocessor coupled to an address bus and a data bus includes a latching register also coupled to the address bus and the data bus. The latching register is responsive to signals from the data bus and address bus for... | 07/12/1983 |
| 4379340 | Communications subsystem idle link state detector A data processing system includes a communications subsystem communicating with a number of devices. A counter monitors the communication line to detect when a communication line goes idle, that is at least 15 successive binary ONE bits appear on the line... | 04/05/1983 |
| 4342985 | Remote sensing and control system A remote sensing and control system wherein a plurality of remote sensing units are connected to a central control and monitoring console by only four interconnecting wires. A clock signal is converted to a plurality of parallel address signals at the loc... | 08/03/1982 |
| 4164730 | Externally controllable binary interrogation and decoding circuit, particularly for a remote control load selection system To permit external programming of the decoding of outputs from a binary counter, a polarized power supply is connected, selectively, through a plurality of control gates to the counter, the control gates having transfer switch characteristics and, in depe... | 08/14/1979 |
