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What else can I help you with?
What is another name for eyeglasses?
bifocals?
What is a sentence using the word invention?
The telephone is a great invention in the history of communciation. The invention of radio allowed information to be rapidly sent between continents.
What did Benjamin franklyn invent?
The lightening rod, bifocals
What is necessity is the mother of invention?
It means our great grandpas to the millionth power "necessity" to eat, "mothered" the invention of hunting and cooking food, and so on and so forth
Who invented bifocals the lending library and an efficient heating stove?
Ben Franklin.
Is Benjamin Franklin's invention of the bifocals still being used today?
Yes, many people have bifocals.
What Chinese invention did Benjamin Franklin use?
Glasses ...He invented Bifocals .
What was Benjamin Franklin's invention?
He invented the lightning rod, bifocals, the Franklin stove, a carriage odometer, and the glass 'armonica'.
What is a sentence with the word bifocals in it?
Please help me find my bifocals.
Why are bifocals important?
because bifocals are still used today and without bifocals you would have to have 2 pairs of glasses that's why its Important
In what year were soft bifocal contact lenses invented?
Benjamin Franklin is generally credited with the invention of bifocals in 1784
What are some changes of bifocals?
bifocals changed in size, shape, and magnification.
What are glasses that can focus at two different lengths called?
Bifocals.
What is a major invention from the 1700's?
The piano (1709). The lighting rod (1752). Steam road vehicles (1769). Steamboat (1776). Circular Saw (1777). Bifocals (1784).
What did benjamen invent?
* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals* lightning rod * Franklin stove * odometer * bifocals
What is the bifocals patent number?
Bifocal lenses as a concept were not patented; there are dozens of patents related to bifocals, bifocal contacts, and processes to make bifocals.
What is a sentence using the word bifocals?
The bifocals he bought were used. The lower lenses on my bifocals allow me to read more easily.
