Stackable precast concrete stairwell unit

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Description

FIG. 1 is a perspective view of a stackable precast concrete stairwell unit showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is an end view thereof, the opposite end view being the same;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof; and,

FIG. 6 is a cross-section view taken on the line 66 of FIG. 2.

Claims

The ornamental design of a stackable precast concrete stairwell unit, as shown and described.

Referenced Cited
U.S. Patent Documents
3980155 September 14, 1976 Campbell
4248020 February 3, 1981 Zielinski et al.
D270004 August 2, 1983 Struben et al.
6550197 April 22, 2003 Gray
6922960 August 2, 2005 Sataka
Patent History
Patent number: D566298
Type: Grant
Filed: Feb 16, 2007
Date of Patent: Apr 8, 2008
Assignee: Miller-Valentine Construction LLC (Dayton, OH)
Inventors: Joseph A. Bornhorst (Dayton, OH), Vincent Combs (Kettering, OH), James J. Griffin (Dayton, OH), Benson T. Rhoads (Kettering, OH), David J. Settles (Springboro, OH)
Primary Examiner: Doris Clark
Attorney: Jacox, Meckstroth & Jenkins
Application Number: 29/272,786
Classifications
Current U.S. Class: Stepped (12) (D25/63)