Patents by Inventor J. Mark McDonald

J. Mark McDonald 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).

  • Vertically folding wall partitions
    Patent number: 6267169
    Abstract: A vertically foldable wall partition comprises a plurality of panels mounted to a number of horizontally spaced-apart vertically foldable skeleton framework. Each skeleton framework includes a number of pivotally interconnected arms which are adapted to be successively folded in a predetermined sequence. The sequential folding is controlled by a lifting mechanism. The vertically foldable wall partition further includes a universal sealing member which can be either used as an end seal or as a hinge seal.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: July 31, 2001
    Assignee: Railtech Ltd.
    Inventor: J. Mark McDonald