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Description

FIG. 1 is a front view of our design, the back view of our design being a mirror image of FIG. 1.

FIG. 2 is a right side elevational view of our design, the left side view of our design being a mirror image of FIG. 2.

FIG. 3 is top view of our design; and,

FIG. 4 is a bottom view of our design.

Referenced Cited
U.S. Patent Documents
3225413 December 1965 Bird et al.
3241269 March 1966 Reffell
3939614 February 24, 1976 Frommelt et al.
4750299 June 14, 1988 Frommelt et al.
5097548 March 24, 1992 Heck et al.
5205086 April 27, 1993 Heim
5421128 June 6, 1995 Sharpless et al.
5570544 November 5, 1996 Hale et al.
Foreign Patent Documents
403981 December 1990 EPX
Patent History
Patent number: D411020
Type: Grant
Filed: Jul 20, 1998
Date of Patent: Jun 15, 1999
Assignee: Omnistructure R&D llc (Boulder, CO)
Inventors: Mark Lindsey Cotton (Longmont, CO), Michael Warren Doland (Niwot, CO)
Primary Examiner: B. J. Bullock
Attorneys: F. A. Sirr, E. C. Holland & Hart llp Hancock
Application Number: 0/90,936
Classifications
Current U.S. Class: Architectural Stock Material (D25/102)
International Classification: 2501;