1935 Sparkman & Stephens
[From Wikipedia with minor revisions:} Sparkman & Stephens Inc was formally created on October 28, 1929, with five partners: Drake Sparkman and his younger brother James Sparkman, James Murray, and brothers Olin J. Stephens and Roderick Stephens.
The Stephens brothers began their careers as self-taught sailors on Barnstable Bay, Massachusetts. Both entered the marine industry at an early age – Olin apprenticing in yacht design under Philip Rhodes, and Roderick learning shipbuilding at the prominent Nevins Yard in City Island, New York, which would later produce several of his firm’s designs. With their father’s backing, the 21-year-old Olin and his brother entered into a partnership with the already successful yacht broker Drake Sparkman, and Sparkman & Stephens, Inc. was formed.