Patents by Inventor Herbert M. Walker

Herbert M. Walker 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).

  • Publication number: 20250049237
    Abstract: A multi-layered pillow protector includes a first panel; a second panel that is perimetrically joined to the first panel such that the inner surfaces of the first panel and the second panel define a cavity having a void volume configured for the disposal of a pillow from one side; a plurality of appended panels adjoined externally along one of the sides of the first panel and the second panel with the rest of the sides of each of the appended panels independently accessible to move to form a plurality of layers on the first panel and second panel; and each of the plurality of appended panels can be interchangeably used as head resting surfaces by flipping over the first and second panels.
    Type: Application
    Filed: October 21, 2024
    Publication date: February 13, 2025
    Inventor: Herbert M Walker
  • Patent number: 5943418
    Abstract: A ring-trip circuit monitors the voltage developed across a source resistor coupled to one of the leads of the subscriber line circuit, regardless of the ringing frequency of the ringing voltage applied to the line circuit, and irrespective of the polarity of the DC loop current developed in the line. In response to detecting a prescribed threshold level of the source resistor voltage--indicating that the customer has answered the call, the ring-trip circuit provides a digital output that is read by the control equipment of the central office to terminate the ringing voltage.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: August 24, 1999
    Assignee: Harris Corporation
    Inventor: Herbert M. Walker