Patents by Inventor Thomas Leisman

Thomas Leisman 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: 4681186
    Abstract: An escape device having a tubular escape chute with upper and lower ends. At least one zipper extends longitudinally at least along a portion of the chute in order to provide for entry into or exit out of the chute at different elevations. The chute has a friction-creating material which extends through a major portion of the chute's longitudinal extent thereby permitting an individual descending in the chute and contacting the panel to have his or her rate of descent retarded. The inner chute may have inner pleats resiliently maintained by an elastic member. The chute may consist of an inner tube and an outer tube.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: July 21, 1987
    Assignee: Dynavac, Inc.
    Inventors: Thomas Leisman, Jon Huston