It is possible to invest in U.S.-based companies that pay dividends of up to 6.5% with 100% certainty that the assets they own are American through and through. How? By focusing on real estate investment trusts (REITs) like Essex Property Trust (ESS -1.42%), Rexford Industrial Realty (REXR 0.46%), and Kilroy Realty (KRC -0.70%). By design, these three REITs are U.S.-based businesses.Here's what you need to know about each one.1. Essex Property Trust owns apartmentsEssex Property Trust's physical assets are ...