A product feed apparatus for feeding a row of products towards the front edge of a shelf has an elongate track mounted on the shelf so as to extend from a rear edge to the front edge of the shelf. The improved surface aeration impeller includes a hub and a first blade that is connected to the hub. The system identifies compliance barriers facing individual patents and recommends services designed to overcome those barriers. The liquid crystal display with flattening coating film of the present invention comprises a liquid crystal display element having a transparent flattening coating film formed from the above coating liquid. Here, the reception wave in the direction towards the transmitting circuit is blocked by the low-pass filter. The method operates on the array as an array consisting of greatest common base class objects.