Lancer tooth brush
From Patentbarquestions
Lancer Toothbrush – There are two versions of this question as well.
Two answers are correct.
(1) “The Lancer patent discloses and claims an electric toothbrush,
but does not mention whether its toothbrush includes a power supply”
and (2)“The on/off switch in the Lancer patent is on a different side of the body
than recited in the claim for the electric toothbrush in the patent application” are both correct.
So depending on the version of the question you get, you will need to answer one of these or both.

