| 20110303139 | External inflatable keel for portable inflatable boats - An inflatable boat including at least one inflatable tube forming first and second pontoons, the first and second pontoons meeting at a front of the boat to form a stem; a floor constructed of a flexible non-inflated fabric material spanning the area between the first and second pontoons and attached to the bottom of the first and second pontoons; and an inflatable keel formed of an inflatable high-pressure drop stitch material and secured to the bottom of the floor. | 12-15-2011 |