What charge card, developed in 1950, was the first to be accepted nationally in the US?

In 1853, American inventor Elisha Otis demonstrated a freight elevator equipped with a safety device to prevent falling in case a supporting cable should break. This increased public confidence in such devices. Otis established a company for manufacturing elevators and patented (1861) a steam elevator.

Many people think that he invented the elevator, but the truth is, he invented the elevator brake. He also invented the railway safety brake.

William Gray, inventor of the pay telephone, also invented the inflatable chest protector worn by baseball umpires and catchers.

Instant mash was invented by Edward A Asselbergs, a Canadian, in 1962. The mash is actually dehydyated potato flakes.

John Boyd Dunlop, a veterinary surgeon, invented the pneumatic tyre in 1887.

Invented in 1885.

It was invented around the early 1700's.

Zworykin invented both the tube (iconoscope) for transmission and the receiver (kinescope) in 1923 and 1924, respectively.

The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.

The IEEE (Institute of Electrical and Electronics Engineers) was formed in 1963 by the merger of the Institute of Radio Engineers (IRE, founded 1912) and the American Institute of Electrical Engineers (AIEE, founded 1884).