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| Number | Title | Issue Date |
| 4728754 | Inter-bus system The inter-bus system provides the communication interconnection between communication systems to form a large telegraph packet switching exchange for example. The fast inter-bus system uses an RS-485 interface, however, the specific protocol used has part... | 03/01/1988 |
| 4700019 | Method and circuit arrangement for the transmission of data signals to a group of control devices belonging to a loop system A data transmission system having a number of control devices connected by at least one clock-control transmission loop operated directionally dependent insures that a data signal intended for a group of control devices in the system is actually received ... | 10/13/1987 |
| 4700018 | Method and circuit arrangement for the transmission of data signals between two control devices belonging to a loop system A method and apparatus for transmitting data signals between two control devices connected to a loop transmission system are disclosed wherein data signals are transmitted in the form of signal blocks. In addition to the data signal, each signal block inc... | 10/13/1987 |
| 4593154 | Loop-type data transmission/reception network A loop-type data transmission/reception network system has a plurality of data processing stations and a single data transmission/reception route which interconnects said stations in a loop for transmitting necessary data between the stations, each of the... | 06/03/1986 |
| 4538026 | Loop back system for loop transmission line A loop back system for a loop transmission line allows the whole system to be looped back for addition or removal of a transmission device, without cutting off loops and in exactly the same manner as in ordinary data transfer. A plurality of transmission ... | 08/27/1985 |
| 4352201 | Data transmission system A system for the transmission of data from a number of out-station transmitters to a central receiver over a communication line or channel in which each out-station transmitter has an associated timer and a detector which "listens" to the line or channel ... | 09/28/1982 |
| 4058681 | Information transmission system An information transmission network in which a plurality of information processing stations are connected in parallel to a bus line is disclosed. Each station has a communication control means and an information processor. Each control means is capable of... | 11/15/1977 |
