InventHelp Inventor Develops Black Holding Tank Accessory for RVs (SBT-1912) /PRNewswire/ -- "I work in trailer park maintenance and noticed problems that guests have with stopped-up black tanks," said an inventor, from Indio, Calif., prnewswire.com prnewswire.com / feeds prnewswire-com-news-releases .. prnewswire-com-financial-services / / #news / / 23 days 23d Share
