An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Whale oil was used in automobile transmissions as late as 1973.
56
Mico headphones read your brainwaves and select music based on your state of mind.
7
There are only 14 blimps in the world.
69
The electric chair was invented by a dentist!
122
The American Automobile Association was founded for the sole purpose of warning motorists of police speed traps!
36
The first alarm clock could only ring at 4 a.m.
120