Patents by Inventor Ludwig Spechner

Ludwig Spechner 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).

  • Plug-in electromagnetic relay
    Patent number: 4260973
    Abstract: A relay capable of being assembled by machine and electrically connected by dip-soldering operations to metallic strips having prongs passing through an insulating base plate to provide plug-in connections, has metallic leads, lugs and strips preshaped so that when they are mounted in the base plate or the winding spool, as the case may be, pairs of them will interfit at locations where they are then soldered by dip soldering.
    Type: Grant
    Filed: October 31, 1979
    Date of Patent: April 7, 1981
    Assignee: Robert Bosch GmbH
    Inventors: Karl Berthel, Olaf Schmid, Berthold Walter, Ludwig Spechner, Theodor Sturm, Hans-Peter Degel