Construction block

Description

FIG. 1 is a perspective view of the construction block showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a sectional view taken along the line 6--6 of FIG. 3; and

FIG. 7 is a sectional view taken along the line 7--7 of FIG. 2.

Referenced Cited
U.S. Patent Documents
126547 May 1872 Hickox
228052 May 1880 Frost
D237704 November 1974 Lane
566924 September 1896 Morrin
810748 January 1906 Haller et al.
1092621 April 1914 Worner
1456498 May 1923 Binns
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2963828 December 1960 Belliveau
3036407 May 1962 Dixon
3274742 September 1966 Paul, Jr. et al.
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3557505 January 1971 Kaul
3936987 February 10, 1976 Calvin
3995434 December 7, 1976 Kato et al.
4016693 April 12, 1977 Warren
4110948 September 5, 1978 Cambiuzzi et al.
4207718 June 17, 1980 Schaaf et al.
4208805 June 24, 1980 Collier
4228628 October 21, 1980 Schlomann
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Foreign Patent Documents
392474 November 1908 FRX
1385207 February 1975 GBX
Other references
  • The Besser Company bulletin, Feb. 1985. The Hollow Building Tile Assoc. handbook, p. 11, Jan. 1924. The Besser Company brochure, "Modular Concrete Block", 1984. The Besser Company brochure, "Paving Stone", Jun. 1984.
Patent History
Patent number: D296365
Type: Grant
Filed: Sep 18, 1986
Date of Patent: Jun 21, 1988
Assignee: Keystone Retaining Wall Systems, Inc. (Edina, MN)
Inventor: Paul J. Forsberg (Richfield, MN)
Primary Examiner: A. Hugo Word
Law Firm: Burd, Bartz & Gutenkauf
Application Number: 6/909,097
Classifications
Current U.S. Class: Arcuate Detail (D25/116)