Patents by Inventor Terrance L. Markwardt

Terrance L. Markwardt 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).

  • Patent number: 4836800
    Abstract: A plugable connector for splicing telephone cables comprising a pair of connector bodies each having a plurality of contact elements, one body with a male terminal and the other with a female terminal and said female terminal being in a recess and each male terminal being surrounded by an insulating wall to fit within said recess when said terminals are joined.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: June 6, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terrance L. Markwardt
  • Patent number: 4835854
    Abstract: Splices in multi-wire cables are orderly when wires of the same length, each affixed to a pluggable connector, are joined and the connectors are rotated 180 degrees to maintain the wire pairs orderly and are bundled.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: June 6, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terrance L. Markwardt
  • Patent number: 4834668
    Abstract: An electrical connector for connecting telephone cables wherein an end of each wire is connected to a part of the connector and then cut through cutoff holes in the connector cover, and when the connector parts are assembled to splice the cables said cover has portions to cover the cutoff holes.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: May 30, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terrance L. Markwardt
  • Patent number: 4817282
    Abstract: A method of replacing a portion of an old telephone cable by a new cable portion without interrupting service to the line is handled by forming parallel circuits, redundant circuits and then disconnecting the old cable.
    Type: Grant
    Filed: February 5, 1988
    Date of Patent: April 4, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terrance L. Markwardt
  • Patent number: 4496206
    Abstract: An electrical wire connector having a hollow, open-topped insulating body, an insulating cover formed to telescope with the body, the body and cover having complementary latches to retain them in an open position for insertion of wires into wire receiving channels in the cover and also to retain them in the closed position fully telescoped together. A slotted, flat plate wire connector element is retained in the body for connecting two wires supported in the channels in the cover upon telescoping of the cover and body together. At least one of the wire receiving channels is open-sided for insertion of a wire transversely into the channel when the body and cover are in their open position, and at least one deformable resilient finger is provided at the outer edge of each open-sided channel.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: January 29, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance L. Markwardt, Gerald W. Teiken
  • Patent number: 4444447
    Abstract: An electrical wire connector having a hollow, open-topped insulating body and an insulating cover formed to telescope with the body, the body and cover having complementary latches to retain them in an open position for insertion of wires and also to retain them in the closed position fully telescoped together. A slotted, flat plate, copper alloy wire connector element is retained on the base of a U-shaped wire cut-off and strain relief element centrally within the body. The wire cut-off and strain relief element is formed of a metal having a hardness greater than that of the wire connector element to provide the softer metal needed for the electrical contact in the connector element while providing the desired harder metal for cutting the wires and providing strain relief.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: April 24, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Terrance L. Markwardt