air conditioner,
on trial
airplane,
on trial
alarm
system, on trial
appliances
arcade
games
audio
recorder
BATTERY*
defined,
homemade
camcorder
CD,
on trial
computer
credit
card
CyberTracker
DVD,
on trial
electronic
fund transfer
film
industry
GENERATOR*
defined,
homemade
high tension electrical wires
home
security
internet,
on trial
laser,
on trial
lighting,
on trial
medical
equipment, on
trial
microwave
MOTOR*
defined, homemade
MP3
music
synthesizer
personal
devices
radio,
on trial
remote
controls
rocketry
satellite
sensors
surveillance
telephone,
on trial
television
tivo
train,
on trial
TRANSFORMER*
defined,
homemade
VCR
*
one of 4 basic electrical inventions from which many others came