TREA

Air duct riser

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Information

  • Patent Grant
  • D341655
  • Patent Number
    D341,655
  • Date Filed
    Friday, February 5, 1993
    33 years ago
  • Date Issued
    Tuesday, November 23, 1993
    32 years ago
Information
Abstract
Description
Claims
  • The ornamental design for an air duct riser, as shown and described.
US Referenced Citations (7)
Number Name Date Kind
24660 Potts Jul 1859
D314820 Sullivan Feb 1991
567231 Glauber Sep 1896
925762 Eager Jun 1909
2086007 Tompkins Jul 1937
2215318 Bristol Sep 1940
4773197 Sullivan Sep 1988
Non-Patent Literature Citations (3)
Entry
Exhibit A--Photograph of prior air duct riser.
Exhibit B--Photograph of prior air duct riser.
Sales information from Northern Pipe Products and GPK Products, Inc. (Undated but believed to be prior art to the present application).
Continuations (1)
Number Date Country
Parent 852094 Mar 1992