Portable phone's inventors didn't foresee its popularity

This note appeared in the Chicago Tribune web edition a few days ago. The thing is that the celular phone were not popular until 20 years after it was invented the first version: Motorola DynaTAC.

"It was 10 years after we built the first phone that it became a commercial product, and 10 years after that when it really started to become popular with consumers," Donald Linder, a retired Motorola engineer who led the mobile phone research team, said.

Working long hours and drawing on Motorola's widespread resources, Linder's team produced the DynaTAC, also known as the "brick phone." It was 9 inches long, not counting the antenna, and weighed more than 2 pounds, but you could carry it, and it worked.

Thanks for reading.