This is the final version of the Bell logo, which was adopted on October 12, 1969. It featured a simplified Bell icon along with a modified version of the Helvetica font, with modified characters and spacing (best seen on the l's on "Bell").[1] It was created by Saul Bass and would also be used for Western Electric Company. The Bell Telephone Company was dissolved in February 13, 1984, leaving behind AT&T. This logo continued to be used by the seven "Baby Bell" companies spun off from AT&T, as well as their minority owned telephone companies Cincinnati Bell and the Southern New England Telephone Company.
AT&T Archives- Saul Bass Pitch Video for Bell System Logo Redesign-2
Saul Bass's pitch film for his Bell System logo redesign