Metal plates are flat pieces of metal that can be used for a variety of purposes. HASPS, which is an acronym for Hinged Anchor Staple Plate System, is a type of metal plate that is used to secure doors or windows. PATENS, which stands for Patent Application Technology Electronic Network System, is another type of metal plate that is used to protect intellectual property rights. Both HASPS and PATENS are commonly used in the construction industry.