History development

Update:21 Sep 2018

In 1880 - Oliver Heavis obtained a patent for coaxial cable in England (patent number 1,407).
In 1884, Werner von Siemens obtained a patent for coaxial cable in Germany.
1941 - AT&T laid the first commercial coaxial cable in the United States. And in Minneapolis, Minnesota, connected to the history of Wisconsin. The L1 system it uses can accommodate a TV band or 480 telephone lines.
1956 - The world's first transatlantic coaxial cable - TAT-1 (Transatlantic No. 1) has been laid.

https://www.sanyuan-cable.com