Patents by Inventor Keith J. Duffy

Keith J. Duffy 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: 5791099
    Abstract: A swimming pool is formed of a plurality of multi-wall sections, each multi-wall section comprises a preformed plastic or resin and has an inner wall and an outer wall, with the inner wall and the outer separated to define an air space therebetween. The assembled pool walls are spaced a width w at a base of the swimming pool and taper to a width y at an intermediate height of the swimming pool between the base and a top of the swimming pool, wherein w>y. At the top of the swimming pool, the walls are separated a width x, wherein x>y. The swimming pool comprises an all plastic or resin construction, and may either be employed as an above-ground pool or an in-ground pool.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: August 11, 1998
    Assignee: Pacific Industries, Inc.
    Inventor: Keith J. Duffy
  • Patent number: D394907
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: June 2, 1998
    Assignee: Pacific Industries, Inc.
    Inventor: Keith J. Duffy