As used in this article, the following terms shall have the meanings indicated:
A sticker having numbers stamped thereon in numerical order and indicating the year for which the same is issued.
Includes but is not limited to what is commonly referred to as bicycles and tricycles and shall include every device propelled by human power upon which any person might ride, having two tandem wheels or a three-wheel device, with either one, both or all of the wheels having the diameter of 20 inches or more.
Any individual person, firm, association or corporation.