472. Publication by use.

472.     Publication by use.

An invention will be published1, so as to invalidate a subsequent patent, even though there is no deliberate display of it and it never comes into the hands of the public, by its use in a public place, so as to enable members of the public to see and understand it2. Use on private premises, in a place where members of the public in fact penetrate so as to see the invention, will suffice3. The fact that the use excited no interest and created no public demand is immaterial