When Tesler made his invention, he worked for the Xerox company. He hated the cumbersome systems he had to work with, and therefore wanted an easier way.
After his time at Xerox, Tesler started working at the then young computer company Apple. There he developed the Lisa and Macintosh computers. They made sure that the general public was introduced to copy pastes.
Tesler also worked for Apple on the Newton MessagePad, a portable computer where people could work directly on the screen. It was not a commercial success, but it was the predecessor of the iPhone and the iPad.
Tesler received a fitting tribute on the internet today. Inventor of copy-paste deceased, copy-paste Twitterers en masse.