A brand name is distinctive with reference to the material to which it applies and the registration of a pesticide under the same brand name by two or more manufacturers or shippers should be denied or refused. This principle applies also to the registration of brand names so similar in character as to be likely to be confused by the purchaser In the event the same name or a closely similar one is offered by another manufacturer, the secretary may decline the said name a second time, for registration unless required to do so by an order of court.
Iowa Admin. Code r. 21-45.12