Backpack for concrete tools

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FIG. 1 is a top, front, left side perspective view of a backpack for concrete tools showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a front elevational view thereof, shown in a partially opened condition.


The ornamental design for a backpack for concrete tools, as shown and described.

Referenced Cited
U.S. Patent Documents
1359320 November 1920 Brenan
D120867 June 1940 Lyon
D144557 April 1946 Graham
2479472 August 1949 Coplon
D223315 April 1972 Kerher
D396554 August 4, 1998 Roeder
D477908 August 5, 2003 Mear et al.
D485982 February 3, 2004 Merkel et al.
D533996 December 26, 2006 Cassegrain
Patent History
Patent number: D553350
Type: Grant
Filed: Mar 10, 2006
Date of Patent: Oct 23, 2007
Inventor: Robert J. Dvorak (Justice, IL)
Primary Examiner: Ian Simmons
Assistant Examiner: Anna J. Burmeister
Attorney: Mathew R. P. Perrone, Jr.
Application Number: 29/255,623
Current U.S. Class: D3/217