1784
He invented bifocal glasses.
Lightning rod, Franklin stove, and bifocal glasses.
bifocal glasses
what year did Benjamine invent electricity 1706
YES
No, but he is credited with inventing the first pair of bifocals - prior to that, people needed two sets of spectacles, one for distance, one for reading. Franklin combined them into one.
Benjamin Franklin invented the arrangement of the glasses in 1761.
no way. Benjamin Franklin did.
Benjamin Franklin is credited with inventing the bifocal lens in the 1780s. He designed the lens to help address his presbyopia, a condition that makes it difficult to focus on close objects as people age.
benjamin franklin invented spectacles,(glasses),and discovered electricity.
no
It's not easy to tell you when Franklin invented glasses, because they were well documented in Europe prior to 1300, i.e. 500 years before Franklin was born. Ben Franklin did invent a number of other things, including bi-focals.