Kid Gavilan is often given credit for inventing the bolo punch--a combination of a wide uppercut/right cross/swing that was delivered seemingly from the floor--by popularizing it in the late 1940s and 1950s.
But during the 1930s Ceferino Garcia was effectively using what reporters and broadcasters then called the "bolo punch"--based upon the bolo knife Filipinos used for chopping difficult vegetation. (See, for example, footage contained in the documentary World Champions of the Great Pinoy Boxing Era.)
Filipino boxer Macario Flores is the earliest-known practitioner of this punch. According to the March 27, 1924 Tacoma News Tribune (Tacoma, WA, USA): "Flores lets his right hand go just as his country men throw a bolo knife. The blow is not only hard, but it is as fast as a streak of lightning, being almost impossible to follow with the human eye."