Who invented the pencil sharpener?

Of course the very first pencil sharpeners were knives and blades, but the first patent for a tool especially for sharpening pencils was made by Bernard Lassimone, a French mathematician, in 1828. It looked something like this:

This isn't Lassimone's sharpener but it is similar.

However the first mechanical pencil sharpener was invented by Therry des Estwaux, also from France in 1847. It looked something like this:

The Marion pencil sharpener

Now there are sharpeners with revolving handles, and even battery operated electric sharpeners, but I like the simple wooden ones like this:

Simple is best