Walter Brattain was an American physicist best known for his role in the invention of the transistor. Born on February 10, 1902, he worked at Bell Labs alongside John Bardeen and William Shockley. Their collaboration led to the development of the first point-contact transistor in 1947, which revolutionized electronics. Brattain's contributions to science earned him the Nobel Prize in Physics in 1956, shared with Bardeen and Shockley. The transistor became a fundamental building block of modern electronic devices, paving the way for advancements in technology, including computers and smartphones. Brattain passed away on October 13, 1987.