694. Method or principle of construction.

In relation to old designs1, although a design might in some cases incidentally protect a mode of manufacture2, a registration would not be valid if it was for a method or principle of construction in itself3; and the registration of a design in order to cover all alternatives is invalid, as it would give the same result4. If what is registered, however, has the requisites of a novel and original design, it is no objection that it could also have been protected by letters patent