Patents by Inventor Wayne E. Stevenson, Jr.

Wayne E. Stevenson, Jr. 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: 4091537
    Abstract: A hand-held safety utility knife having an elongated shaped handle within which a replaceable cutting blade is securely retained, wherein the knife assembly is also provided with a compression-extension spiral spring loaded retractable blade guard that is mechanically cooperative with the cutting blade of the knife and manually activated for retraction by depressing a compression-extension spiral spring loaded trigger thereby enabling cutting utility of the blade in use application, and upon manual trigger release after use application provides non-use safety locking of the guard with respect to the utility knife cutting blade.
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: May 30, 1978
    Assignee: Stevenson Machine Shop
    Inventor: Wayne E. Stevenson, Jr.