23 January 2014

Telephone switching





The invention: 

The first completely automatic electronic system
for switching telephone calls.

The people behind the invention:

Almon B. Strowger (1839-1902), an American inventor
Charles Wilson Hoover, Jr. (1925- ), supervisor of memory
system development
Wallace Andrew Depp (1914- ), director of Electronic
Switching
Merton Brown Purvis (1923- ), designer of switching
matrices