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Benjamin Franklin is given the credit of inventing bifocal eyeglasses. Franklin never applied for any patents for his many inventions. His attitude was that humanity need not have to pay a price for new inventions that helped people.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoYes. Franklin invented them.
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Do bifocals use lenses?
Yes they do.
What Chinese invention did Benjamin Franklin use?
Glasses ...He invented Bifocals .
What is a sentence with the word bifocals in it?
Please help me find my 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.
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
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 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.
Where were bifocals invented?
bifocals were invented on the 300th block of Market street in Philadelphia
How many syllables does bifocals have?
The word "bifocals" has three syllables: bi-fo-cals.
How do you use bifocals and television in a sentence?
I used my bifocals to watch the television
