Patents by Inventor Charles L. Adas

Charles L. Adas 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).

  • Ladder
    Patent number: 3944024
    Abstract: A ladder is made from extruded aluminum steps supported on a pair of vertical tubes fitted through large diameter holes drilled vertically through the steps. The steps are hollow except for a pair of vertical walls extending longitudinally thereof and lying on opposite sides of the vertical holes. Small horizontal holes are drilled through these walls from the rear of the steps to receive fastening pins which are driven through the tubes to locate and support the steps on the tubes.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: March 16, 1976
    Assignee: Detroit Marine Engineering
    Inventor: Charles L. Adas