Patents by Inventor Roland Wissaert

Roland Wissaert 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).

  • Apparatus for direct line switching
    Patent number: 4058684
    Abstract: Apparatus is described for use in centrally controlled telecommunication switching systems having direct line service facilities. A direct line key, via a direct line repeater, is directly connected to a specified direct line station. Through operation of an exchange key, e.g., at a switchboard, the link connecting process to the direct line station is begun using a connecting path which is ready for seizure.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: November 15, 1977
    Assignee: Siemens Aktiengesellschaft
    Inventors: Artur Nagel, Roland Wissaert