Retaining wall building block

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Description

FIG. 1 is a top plan view of a retaining wall building block of a first embodiment showing my new design;

FIG. 2 is a right side elevational view of the retaining wall building block, the left side being a mirror image thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front view of a retaining wall building block of a second embodiment.

Referenced Cited
U.S. Patent Documents
D217244 April 1970 Fairfield
D296007 May 31, 1988 Forsberg
D296365 June 21, 1988 Forsberg
D300253 March 14, 1989 Forsberg
D300254 March 14, 1989 Forsberg
D310267 August 28, 1990 Zeidman
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4521138 June 4, 1985 Steiner
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4671706 June 9, 1987 Giardini
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5072566 December 17, 1991 Zeidman
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Foreign Patent Documents
2651258 March 1991 FRX
Other references
  • Seagren Industries, Inc., St. Louis, Missouri, Loffelstein Retaining Walls, pp. 1-4 and insert, Circa. 1990. Kiltie Corporation, North St. Paul, Minnesota, Versa-Lok Retaining Wall Systems, Foldable insert, 1989. Keystone Retaining Wall Systems, Inc., Minneapolis, MN., Compac Unit, pp. 1 and 2, 1990. Keystone Retaining Wall Systems, Inc., Minneapolis, MN, Keystone Retaining Wall Systems, Foldable insert, 1991. Allan Block Corporation, Bloomington, MN., Allan Block Retaining Walls, pp. 1-4 and two inserts, 1990. Stone Wall, Lanscape Retaining Wall System, pp. 1-4 and one insert, Circa. 1990.
Patent History
Patent number: D372106
Type: Grant
Filed: Jun 18, 1992
Date of Patent: Jul 23, 1996
Assignee: St. Louis Retaining Wall Company (St. Louis, MO)
Inventor: Mark A. Woolbright (St. Louis, MO)
Primary Examiner: Doris Clark
Law Firm: Senniger, Powers, Leavitt & Roedel
Application Number: 7/900,907
Classifications
Current U.S. Class: Construction Block Or Brick Type (17) (D25/113)