Level indicators; Laser measuring systems; Lasers for measuring purposes; Laser pointing device for use with firearms; Tactical laser sights; Measuring apparatus, namely, laser distance meters; Spirit levels; Bubble levels; Carpenter's levels; Infrared detectors; Range finders for golf; Lasers for measuring; Laser level measuring apparatus; Straight edge instruments for measuring flatness; Rangefinders; Laser rangefinders; Laser thickness gauges; Range finders; Laser range finders; Infrared d...