John Joseph Merlin was an 18th-century Belgian inventor and mechanical engineer, best known for his creation of the first roller skates. Born in 1735, he moved to England, where he showcased his innovative designs and inventions. His roller skates, which combined wheels with a shoe, were a significant advancement in personal mobility and entertainment. In addition to roller skates, Merlin invented various mechanical devices, including automata and musical instruments. He was also known for his work with clockwork mechanisms and theater machinery, contributing to the development of stage effects in performances. His inventive spirit left a lasting impact on both engineering and entertainment.