* The Franklin stove, a more efficient wood stove that produced less smoke and heat.
* The lightning rod, which protected buildings from lightning strikes.
* The bifocal lens, a type of eyeglasses with two different focal points.
* The flexible catheter, a medical instrument used to empty the bladder.
* The Pennsylvania fireplace, a type of fireplace that was more efficient than traditional fireplaces.
* The odometer, a device used to measure the distance traveled by a vehicle.
* The lightning kite, which was used to demonstrate that lightning is a form of electricity.
* The armonica, a musical instrument made of glass bowls that were played by rubbing the rims with wet fingers.
* The glass harmonica, a musical instrument made of glass bowls that were played by rubbing the rims with leather-covered mallets.
* The flexible urinary catheter, a medical instrument used to empty the bladder.