Walter A. Hill · Orville

Main Entry: Walter A. Hill
Patent Title: Movable Root Contact/Pressure Plate Assembly for Hydroponic System
Family Name: Hill
Given Name: Walter
Middle Name: A.
Patent Date: June 8, 1993
Patent Number: 5,216,836
Location: AL

Item sets: INDEX OF BLACK INVENTORS BY STATE OR COUNTRY OF RESIDENCE 1834-2008