Patents by Inventor Karl D. Vandivier

Karl D. Vandivier 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: 5610971
    Abstract: A telephone for mobile application affords hands-free operation when the handset is seated in a cradle and hand-held operation when removed from the cradle. The two modes are automatically sensed by a reed switch in the handset operated by a magnet in the cradle. The back of the handset, which is accessible when in the cradle, contains a back keypad and a back display, and the front of the handset contains a front keypad and a front display along with a microphone and an earpiece. When the reed switch senses hands-free mode only the back keypad and display are enabled, along with an external speaker and microphone. When hand-held mode is sensed, the front keypad, display and audio functions are enabled.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: March 11, 1997
    Assignee: Delco Electronics Corporaiton
    Inventor: Karl D. Vandivier
  • Patent number: 5555448
    Abstract: A portable phone comprises a handset having a low power radio transmitter and a base station having a booster transmitter that is optionally coupled to the handset for better transmission. A docking cradle has a nest to receive a boat and the boat has a pocket to receive the handset. The boat is connected to the base by a cord and a connector in the boat is coupled to the handset when the handset is seated in the boat. The cradle, boat and handset are nested together for compact hands-free operation, the handset is removed from the boat for portable operation, or the handset and boat together are removed from the cradle for wire-connected hand-held operation.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: September 10, 1996
    Assignee: Delco Electronics Corporation
    Inventors: Paul W. Thiede, Karl D. Vandivier