Patents by Inventor Carl D. Butler

Carl D. Butler 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: 4120052
    Abstract: The cushioned protector aids in preventing injury to the knees and/or elbows of the wearer and includes a stretchable sleeve of textile material which is easily drawn over and resiliently engages and covers the elbow or knee of the wearer. A cushioning pad is carried by the sleeve and a protective plastic panel covers the cushioning pad. Adjustable elastic straps are provided adjacent opposite ends of the protector to encircle the protector and aid in preventing slipping of the sleeve on the limb of the wearer.
    Type: Grant
    Filed: October 12, 1977
    Date of Patent: October 17, 1978
    Assignee: Royal Textile Mills, Inc.
    Inventor: Carl D. Butler