* Karl Benz: German engineer and inventor credited with creating the first practical gasoline-powered automobile.
* Katherine Blodgett: American physicist and chemist who invented non-reflective glass, used in eyeglasses and camera lenses.
* Ken Olsen: Founder of Digital Equipment Corporation (DEC), a pioneer in minicomputers and computer networking.
* Kimball Cady: American inventor who co-invented the first commercially successful electric typewriter.
* Konstantin Tsiolkovsky: Russian scientist and inventor who is considered the father of theoretical astronautics.
* Kurt Lewin: German-American psychologist known for his work on field theory and social psychology. He also developed the "T-group," a training method used in organizational development.
This is just a small selection, and there are many other notable inventors whose names begin with K.