Patents by Inventor Daniel Visnaw

Daniel Visnaw 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: 4817224
    Abstract: An adjustable doorway ramp apparatus is set forth wherein a doorway ramp is of a triangular wedge member configuration and includes a first, second, third, fourth, fifth, sixth, and seventh ramp associated therewith. The first ramp is positioned at an uppermost portion of the ramp apparatus and is pivotally mounted in forwardmost portion thereof with a fourth ramp pivotally mounted displaceably rearwardly therefrom by a rack and pinion arrangement. A second ramp is in underlying position to said first ramp and is of a trapezoidal configuration and releasably securable to a third ramp of trapezoidal configuration dimension substantially greater than that of said second ramp. A fifth ramp is positionable between said first and second ramps to arcuately position said first ramp relative to said second ramp with a sixth ramp and seventh ramp slidably mounted within said third ramp for positioning about an associated door sill.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: April 4, 1989
    Inventors: Daniel Visnaw, Dale Lockwood