Google Patents Roller keel boat trailerĭownload PDF Info Publication number US2586485A US2586485A US108376A US10837649A US2586485A US 2586485 A US2586485 A US 2586485A US 108376 A US108376 A US 108376A US 10837649 A US10837649 A US 10837649A US 2586485 A US2586485 A US 2586485A Authority US United States Prior art keywords boat trailer chassis rollers roller Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2586485A - Roller keel boat trailer