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: August 29, 1989
Patent Number: 4,860,490
Location: AL

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