From 1935 onward, he explored the use of electronics for telephone exchanges and by 1939, he was convinced that an all-electronic system was possible.
By 1939, he was convinced that an all-electronic system was possible. From 1935 onward, he explored the use of electronics for telephone exchanges.
From 1935 onward, he explored the use of electronics for telephone exchanges. By 1939, he was convinced that an all-electronic system was possible.
From 1935 onward, he explored the use of electronics for telephone exchanges. By 1939, he was convinced that an all-electronic system was possible.