Homer's son Bart points out that the chair is not featured on a list of Edison's inventions, and that maybe no one knows he invented it.

Kaplan's son Rueben, invented the "Grip-O-Matic" universal gear puller and received his first patent.

How many people know, for example, that his son, John, invented Lincoln Logs?

The same son also invented a machine to help mass production of this lure.

His three sons invented masonry, metallurgy and music, and his daughter weaving.

Another son, James Nasmyth, invented the steam hammer.

His sons, in turn, invented the famous Downlite, a ceiling fixture patented in 1936.

Meanwhile, his son, E. C. Firth, invented the 'ironclad' pumice washing boiler.

After many unsuccessful attempts, Merrix's son, Aarren d'Cannith, finally invented the process used in the creation forges.

In 1441, king Sejong's son, Prince Munjong, invented the first standardized rain gauge.