U.S. federal trademark · Serial No. 78209428 · Reg. No. 2841818
Educational science equipment used for student learning of simple machine principles, consisting of an inclined plane with wood car, wheel and axle, lever arm and pulley system with wood/plastic frame to support each substation, associated weights, force spring scales, distance measuring aid for calculating work, mechanical advantage and efficiency and instruction manuals sold as a unit therewith
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