Bell's first telephone patent was issued on March 7, 1876. Three days later, in Boston, the telephone carried its first intelligible sentence.

here are 149,084,370 telephone lines in the world, with thousands more being added every day. It's a lot to keep track of...concentration is essential.

his invention, of course, is the telephone. Bell's first phone worked very much like his phonoautograph, with a few technical improvements.