Inventor
ELSON DONALD E
US4 patents
Patents
4 patentsUS4835410AMay 30, 1989
Dual-mode corded/cordless system for power-operated devices
BLACK & DECKER INC255 citations98
US4835409AMay 30, 1989
Corded/cordless dual-mode power-operated device
BLACK & DECKER INC167 citations98
US4928346AMay 29, 1990
Hand-held vacuum cleaner with power brush
BLACK & DECKER INC51 citations90
US4841594AJun 27, 1989
Cordless vacuum cleaner with power brush
BLACK & DECKER INC49 citations90