Global positioning system (GPS) apparatus; Infrared detectors; Life belts; Measuring apparatus, namely, laser distance meters; Optical inspection apparatus; Plumb bobs; Precision instruments for manipulation and positioning of microscopic objects; Telemeters; Tool measuring instruments; Directional compasses; Distance measuring apparatus; Optical lenses; Prisms for optics purposes; Prisms for scientific purposes; Safety goggles; Surveying instruments; Surveying machines and instruments; Surve...