A micro-manipulator has grippers for gripping micro-material; an actuator for driving the grippers; a drive amount detection device for detecting a drive amount of the actuator; a power control device for controlling power supplied to the actuator so that a difference in a target drive amount of the...http://www.google.fr/patents/US7564209?utm_source=gb-gplus-shareBrevet US7564209 - Micro-manipulator
