Complex sentence: In 1904, in combination with his brothers Louis and William, George Schrade formed the Schrade Cutlery Co. in Walden, and began developing a new series of switchblades, which he patented in 1906-07.
Split into simpler sentences: In 1904, in combination with his brothers Louis and William, George Schrade formed the Schrade Cutlery Co. in Walden. In which he began developing a new series of switchblades, which he patented in 1906-07.