Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, life-saving and teaching apparatus and instruments, namely, cameras, cell phones, weighing scales, electric meters, echo sounders, electronic meters to check water depth, luminous beacons, barometers, navigational buoys, signals of fog, sonar, hydrometers, hygrometers, internet browser software for use with global position navigation systems; apparatus and instruments for the con...