Granted Patent
Utility
US 4,665,645 · App. 06/759,451
Structurally degradable root directive tree planter box
Inventors:
Howard Schau, III, Steven C. Townsend
Patented Case
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Granted: May 19, 1987
Filed: Jul 26, 1985
Inventors
Howard Schau, III
Steven C. Townsend
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.