US Patent 10898779 Golf putt training device

A portable device for practicing a golf putting stroke, includes: a base member having a front part and a rear part, where the rear part has an elongate opening; a lower elongate member having an auxiliary support with a first and second rails extending downward, the first and second rails detachably engaged into the first and second grooves; an upper elongate member having a protrusion where an elongate through-hole is vertically formed along the upper elongate member, the protrusion having a vertical elongate opening through an outer end of the protrusion; and a connecting member with a front end of the top part substantially opened side to side other than a first guide rail, the bottom part of the connecting member substantially opened front to rear other than a second guide rail.