Patents by Inventor Manfred Agricola

Manfred Agricola has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Circuit arrangement for telecommunications especially telephone installations that switch through digitally by time division
    Patent number: 4281410
    Abstract: A circuit arrangement for telecommunications, in particular telephone exchange installations that switch through digitally by time division, having a special coupling network for switching audio-signals to terminal units which, besides the connection network provided for the interchange of speech and data information, sets up the connection between terminal units and audio-signal senders and works digitally.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: July 28, 1981
    Inventors: Manfred Agricola, Klaus Dietze, Horst Mayr-Stein, Karl-Heinz Reimer, Andreas Reinhold, Adolf Schmid, Johannes-Georg Schosnig
  • Telecommunication switching network having a multistage reversed trunking scheme
    Patent number: 4245339
    Abstract: The switching network having a reversed trunking scheme of a PCM-(pulse code modulated -) exchange is formed by a first (time division) switching stage (A) consisting of individual switching groups (G l to G m) combined into one major switching group (GG), a second (space division) switching Stage (B1) formed by a number of PCM-lines equal to the number of switching groups (G l to G m) within one major switching group (GG), whereby each switching group is connected with a PCM-line in the outgoing direction, whereas a switching group individual multiplexer (M) performing the access of all PCM-lines to each switching group (G) and a third (space division) switching stage (B2) formed by a number of PCM-lines equal to the number of major switching groups (GG), the bitrate on said PCM-lines being a multiple number of the bitrate of the PCM-lines of the second (space division) switching stage.
    Type: Grant
    Filed: April 20, 1979
    Date of Patent: January 13, 1981
    Assignee: Telefonbau und Normalzeit, GmbH
    Inventors: Manfred Agricola, Willfried Krautkramer, Karl-Heinz Reimer
  • Electronic telephone systems
    Patent number: 3996424
    Abstract: A station direct station selection system is provided with a time division multiplex signalling line which carries all the signals that are required to establish and to terminate connections. The control means for establishing and terminating connections are decentralized and arranged mainly at the locations of the subscriber stations and at the locations of the line transmissions.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: December 7, 1976
    Assignee: Telefonbau und Normalzeid G.m.b.H.
    Inventor: Manfred Agricola