Gertrude E. Downing

Main Entry
Gertrude E. Downing
Patent Title
Recipro-cating Corner and Baseboard Cleaning Auxiliary Attachment for Rotary Floor Treatment Machines
Family Name
Downing
Given Name
Gertrude
Middle Name
E.
Patent Date
February 13, 1973
Patent Number
3,715,772
Location
DC
Item sets
INDEX OF BLACK INVENTORS BY STATE OR COUNTRY OF RESIDENCE 1834-2008