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Stryker Corp

A maker of medical devices and surgical robotics, Stryker sells everything from joint replacements and spinal implants to endoscopes and the Mako robotic surgery platform, used by hospitals and surgeons around the world. It began in 1941, when Michigan orthopedic surgeon Dr. Homer Stryker, frustrated that his tools didn't work, started the Orthopedic Frame Company in his basement to sell his own inventions—including a cast cutter he built from a malted milk mixer motor. The firm was renamed Stryker in 1964 when its founder retired.