So what about that earlier invention this genius had brought?

A list and description of any "prior art," earlier inventions that are relevant to your invention.

One very early invention was the club, which is just a stick that you hit something or somebody with.

The earliest American invention of the flexible catheter was during the 18th century.

However, how this relates to the earlier French invention, and later development, is unclear.

"I've done pretty well," he said of earlier inventions, though he would not give figures.

Because of this, printing methods were never really successful in China, despite their early invention.

Bell's early inventions, while ingenious, failed to move the world.

His early inventions seem to demonstrate a foresight to see the technology curve with business values.

Other earlier inventions were connected with the production of oil, salt and white lead.