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| Number | Title | Issue Date |
| 7293182 | Methods and apparatus for powering a data communications port A data communications device includes a supervisory circuit, a power supply, and a power circuit. The power circuit includes a data communications port, a power supply connection coupled to the power supply, and a power controller coupled to the data communications ... | 11/06/2007 |
| 7062405 | Monitoring of measuring signal, in particular in automation technology The invention relates to a method for monitoring at least one measuring signal, in particular for use in automation technology, production automation and process automation. Said method automatically determines and establishes an optimal time interval between measur... | 06/13/2006 |
| 6965672 | Electronic switching system An electronic switching system, comprising a common source of voltage to a plurality of user stations connected in parallel, an electronic means of connection to electrically connect a chosen user station to the common source of voltage, and a means of disconnection... | 11/15/2005 |
| 6952785 | Methods and apparatus for powering a data communications port A data communications device includes a supervisory circuit, a power supply, and a power circuit. The power circuit includes a data communications port, a power supply connection coupled to the power supply, and a power controller coupled to the data communications ... | 10/04/2005 |
| 6321094 | Access method through radio mobile communication system In a network system including a wireless mobile communications system, when establishing a connection between a wireless mobile terminal and a host computer connected to a stationary network system, the wireless mobile terminal produces a connection estab... | 11/20/2001 |
| 6185294 | Method and apparatus for installing telephone intercom-voice messaging apparatus at doorbell for dwelling A doorbell response system in used in a dwelling including a telephone line and a telephone. The doorbell response system includes a doorbell, doorbell button, speaker, microphone, dialer to initiate the dialing of a telephone number, connection between t... | 02/06/2001 |
| 5920617 | Sensor system with PT1 measuring device The invention provides a sensor system which has a measuring element which has a PT1-action, such as an engine oil temperature sensor for an internal-combustion engine of a motor vehicle. A measured-value analysis unit connected behind the measuring eleme... | 07/06/1999 |
| 5905787 | Method and apparatus for installing telephone intercom--voice messaging apparatus at doorbell for dwelling A doorbell response system is utilized in a dwelling. The dwelling includes a telephone, includes a telephone line connected to the telephone, and includes a doorbell and a pair of doorbell electrical wires which power the doorbell. The doorbell response ... | 05/18/1999 |
| 5708701 | Power line telephone communications system having on hook digital voiceband messaging A power line telephone communications system having an ON HOOK digital voiceband messaging feature by which selected information contained in an incoming call to a telephone is received prior tc the telephone being lifted off its hook. The incoming ring s... | 01/13/1998 |
| 5566233 | Communication controlling apparatus for a single-line telephone with extensions thereto In a single-line telephone, there are a plurality of extension telephone sets connected by a telephone line and each extension telephone set is connected to a communication controlling apparatus. The communication controlling apparatus includes an alterna... | 10/15/1996 |
| 5228078 | Two-wire intercom with hands-free function An intercom system for a door and inside stations has a speech function for two-way communication with hands-free operation. The intercom system includes a two-wire connecting lead between the door station and each inside station to transmit a conversatio... | 07/13/1993 |
