Push-Button Telephone
The push-button telephone was invented in 1941 and is a phone with buttons or keys, and finally replaced dial phones were first used in 1891. The first push-button telephone was invented in the Bell Telephone Laboratories, but these models are only prototypes, and have not been put on the market. The first publicly available push-button telephone was released in 1963 by the Bell System. They were first made available in the towns of Carnegie and Greensburg, Pennsylvania.
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