Air Brake
Air Conditioner
Airship
Automatic Coupler
Automatic Lubricator
Automatic Transmission
Bicycle Frame
Blood Bank
Blood Plasma
Cellular Phone
Clock or Watch
Clothes Dryer
Dustpan
Egg Beater
Electric Trolley
Elevator
Fastest Computer
Filament for Light Bulb
Fire Escape
Fire Extinguisher
Food Additives
Fountain Pen
Gas Mask
George W. Carver
Golf Tee
Hairbrush
Halogen Lamp
Handstamp
Heart Surgery
Heating Furnace
Horseshoe
Ice Cream
Ironing Board
Laser Cataract Surgery
Lawn Mower
Lawn Sprinkler
Lubricator
Mailbox
Mop
Paper Punch
Peanut Butter
Pencil Sharpener
Perm Machine for Hair
Postmark and Cancel Machine
Printing Press
Propeller for Ship
Railway Telegraph
"Real McCoy"
Refrigerator
Refrigerated Truck
Rotary Engine
Screw Socket
Smallpox Vaccine
Smokestack
Steam Boiler
Street Sweeper
Supercharger
Third Rail
Toilet
Toilet (Railcar)
Traffic Signal
Tricycle
Turn Signals
Typewriter
Washington DC city plan