Abstract: A designed electromagnetic wave suppressor includes a design layer, and an electromagnetic wave suppressor having an electromagnetic wave return attenuation of 10 dB or more. A building material includes the designed electromagnetic wave suppressor. An electromagnetic wave suppression chamber includes a room in which at least part of the inner walls is covered with the building material, and a transmitter disposed in the room. A system includes the electromagnetic wave suppression chamber, and a wireless communication device disposed in the electromagnetic wave suppression chamber.

Abstract: In a hairbrush having a base portion for implantation of bristles and a grip portion, bristles are implanted to extend from a center axis in the radial direction viewed in a cross-sectional plane of said implantation portion, in such a fashion that the curve defined by the tips of said bristles describes an arcuate shape, the curve defined by the tips of said bristles is arcuately recessed in a cross section in the longitudinal direction, and the axis of rotation of said grip portion in the longitudinal direction is in parallel with the center axis of said bristles and is spaced apart therefrom by 5 to 15 mm on the side of said bristles.

Abstract: A hairbrush having a base which comprises a bristle-implanted portion on which bristles are implanted and a handle portion formed continuously onto said bristle-implanted portion, said bristles being dispersively and independently implanted radially in respect to said bristle-implanted portion within a region covered by a vertical angle of 210.degree. to 270.degree. in respect to the longitudinal central axis of said bristle-implanted portion on the peripheral surface of said bristle-implanted portion.