Abstract: An antenna device includes an array antenna configured to radiate a radio wave. The array antenna includes at least four radiating elements arranged substantially parallel to a beam scanning plane of the radio wave. The at least four radiating elements are arranged substantially parallel to a first principal surface of window glass for a building, with the antenna device arranged such that the array antenna is arranged at the first principal surface of the window glass in a non-contact manner and such that the radio wave is radiated toward a second principal surface of the window glass opposite from the first principal surface.

Abstract: Scissors with replaceable cutting blades include a pair of handles to which cutting blades are detachable, the handles being pivotally connected to each other by a screw. Each handle has a longitudinally extending groove in which a shank of the corresponding cutting blade is inserted, and a retaining plate is disposed so as to cross a portion of the groove. The shank of the cutting blade inserted into the groove is supported on the handle by the retaining plate so that screws are not needed to attach the cutting blade to the handle.