well i think the bugler alarm does that help?
Not sure but I need an answer fast
the silent vacuum cleaner
He improved/invented the telescope
the compass and the astrolabe.
the telephone and the TV
communication
because...
the phone and email
It improved technology.
Mostly Thomas Edison inventions were discoverered by accident or he also improved the inventions of others , like the camera and the telephone.
The telephone and the TV.
He improved the telescope. discovered a moon with cravers.