Maintenance and repair of residential and commercial roofing systems, including asphalt shingles, metal roofing, flat roofs, tile roofs, and energy-efficient roofing materials; Installation and maintenance of photovoltaic solar energy systems for residential and commercial applications, including rooftop solar arrays, inverters, mounting systems, and energy storage integration; o Installation of exterior siding systems including vinyl, fiber cement, wood, and composite materials for the purpo...

Electronic ignitions for vehicles; Engine cylinders for vehicles; Pistons for engines