[ Scientific, electrical, photographic, optical, weighing, measuring, signaling, checking and teaching apparatus and instruments for use in rapid prototyping, in particular, for use in laser sintering systems, namely, sintering lasers and lasers for measuring purposes, memory cards, pre-recorded CDs, DVDs, magneto-optical discs, magnetic computer tapes, hard computer discs, changeable hard computer discs and floppy computer discs, featuring digitized data for product designs or physical objec...