Patents by Inventor Derrick W. English

Derrick W. English 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).

  • Turn-button with leading helical end portion
    Patent number: 8393654
    Abstract: A turn-button for a lockset includes a head portion and a shaft extending from the head portion. The shaft has a leading helical end portion.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: March 12, 2013
    Assignee: Kwikset Corporation
    Inventors: Lawrence G. Rodriguez, Philip W. Shealer, Derrick W. English