Root barrier

Description

FIG. 1 is a front perspective of the root barrier;

FIG. 2 is an enlarged, fragmentary perspective view thereof;

FIG. 3 is an enlarged, fragmentary, opposite end perspective view thereof;

FIG. 4 is a top plan view thereof with the bottom plan view being a mirror image;

FIG. 5 is a front view thereof; and,

FIG. 6 is a back view thereof.

Referenced Cited
U.S. Patent Documents
2758419 August 1956 Schmitz
2769277 November 1956 Keelor
2859558 November 1958 Hollom
3415013 December 1968 Galbraith
3438146 April 1969 Nickerson
3951294 April 20, 1976 Wilson
4019279 April 26, 1977 Moorman et al.
4457102 July 3, 1984 Ploeger, Jr.
4665645 May 19, 1987 Schau, III et al.
4955156 September 11, 1990 Williams
4995191 February 26, 1991 Davis
5070642 December 10, 1991 Albrecht
Foreign Patent Documents
2241227 March 1973 DEX
Patent History
Patent number: D352871
Type: Grant
Filed: Aug 6, 1993
Date of Patent: Nov 29, 1994
Inventors: Michael E. Miller (San Rafael, CA), George R. McCord (Berkeley, CA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: H. Baynham
Attorney: James J. Leary
Application Number: 0/11,535
Classifications
Current U.S. Class: D 8/1