US Patent 7407574 Rooftop drainage device

A rooftop drainage device is provided for use in protecting rooftop drainpipes from clogging. An exemplary embodiment of the drainage device includes a filter comprising at least three sides, wherein at least one of the sides includes a plurality of apertures for allowing liquid to pass-through the at least one side into the drainpipe, while filtering debris; and an object receptacle mounted to a top of the filter for removably retaining an object, wherein a weight of the object holds the rooftop drainage device on the rooftop and over the drainpipe without need for mechanical fasteners.