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Root-pruning Container
(U.S. Patent and Trademark Office, 1984-04-17)
A root-pruning container involving a series of vertical pyramid like staircase stepped surfaces essentially parallel to the sidewall of said container and displaced to the inside of said container, wherein the vertical and ...
Air-root-pruning Container
(U.S. Patent and Trademark Office, 1985-04-16)
A vertical air-root-pruning container involving a series of vertical air gaps displaced around the sidewall of a container. The air gaps are alternately displaced outwardly or inwardly to air-prune spiral root growth in ...
Air-root-pruning Container
(U.S. Patent and Trademark Office, 1985-02-05)
A vertical air-root-pruning container involving a series of vertical offsets or air gaps displaced around the sidewall of a container. The offsets or air gaps are alternately displaced outwardly or inwardly to air-prune ...