Patents by Inventor Charles F. Andrews

Charles F. Andrews 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).

  • Metal roofing system
    Patent number: 4400924
    Abstract: Roofing strip and clip elements are provided with flange elements which are interengageable by tipping the strip elements first in one direction and then in the opposite direction.A sealing joint is provided by a first set of interengaged surfaces carried by batten and strip members and a second set of interengaged surfaces carried by strip and clip members.
    Type: Grant
    Filed: October 21, 1980
    Date of Patent: August 30, 1983
    Inventor: Charles F. Andrews