9 Scientific, electric, photographic, optical, measuring, signaling, checking and teaching apparatus and instruments for use in rapid prototyping, in particular for use in laser-sintering systems, including lasers, optical lenses and lens systems, scanners, sensors, actuators, material and part handling systems, coordinate measuring machines; data processing equipment, namely computers and data transmission and reception equipment; data processing programs, namely, computer software for use in the field of rapid prototyping