This is when the invention of the alphabet came about.

Most great inventions do not come when you have a gun to your head.

But such invention came widely spaced in the 20-minute work.

She helped many escape, and some useful inventions came from the enterprise.

Around the same time came the invention of the bayonet.

Most great inventions and ideas come out of them, you know.

The minor inventions also come with a primary and secondary action.

You can't improve on it no matter how many inventions come along.

So how on earth did this amazing invention come about?

First comes the basic invention, then a period of refinement.