Patents by Inventor Daniel E. Karwoski

Daniel E. Karwoski 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).

  • Convertible crutch
    Patent number: 4787405
    Abstract: A convertible crutch is disclosed having a generally L-shaped upper support section to a generally S-shaped central support section connected, in turn, to a substantially straight lower support portion. The connection mechanism between the upper support section and the central support section can be utilized to connect the upper support section to the lower support section and convert the crutch to a cane when the central support section is removed.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: November 29, 1988
    Inventor: Daniel E. Karwoski