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| Number | Title | Issue Date |
| 4380009 | Message communication system A message communication system which provides instant messages and memoranda at a telephone user's desk. In an office complex, a message is transmitted over pre-existing office power lines to printers located in a user's office and is automatically posted... | 04/12/1983 |
| 4243836 | Digital autostart circuit A terminal unit having a digital autostart circuit for energizing an output device such as a teleprinter. The autostart circuit responds only to the space character which is transmitted between every word in the commonly used Murray and ASCII codes. A met... | 01/06/1981 |
| 4191848 | Teletypewriter motor controlling The first signal transition of a teletypewriter signal triggers a resettable one-shot that activates the motor run switch to turn the teletypewriter motor on for a minimum interval of from two seconds to several minutes and also is applied to the input of... | 03/04/1980 |
| 4160874 | Process for signaling an interruption in the state of readiness for the reception in data terminal devices in which data are exchanged In a process for signaling an interruption in the state of readiness of a data terminal device in a called station, the data being transmitted over a data selector network, and in particular for teleprinters, following the establishment of a connection, t... | 07/10/1979 |
| 4093819 | Closed user group facility A closed user group facility in a data transmission system which has a closed user group of terminals accomodated in a switching network, and in which the switching network registers a terminating terminal in response to a request for registration of that... | 06/06/1978 |
| 4054745 | Motor control device for data terminals A control device is described for linking a motor operated data terminal to a data processor which provides information signals including data characters and data terminal motor-start signals. The motor associated with the data terminal is selectively ope... | 10/18/1977 |
| 3995106 | Information transmission system The invention refers to a system for rapidly transferring optical information from a document to a human being over a telecommunication channel. The system comprises an optical reader connected over the telecommunication channel to a visual display termin... | 11/30/1976 |
| 3938187 | System for putting an information record onto a magnetic substrate An information recording system comprises a peripheral control unit for recording bits of a character one at a time coincident with the middle of a record time interval. The peripheral control unit is responsive to a central unit which cyclically transmit... | 02/10/1976 |
