Complex sentence: Four years later he was joined by Jerry Johanson, who had formerly worked with Jenike while in graduate school, and in 1966 Jenike incorporated the company Jenike & Johanson, Inc. The company was initially headquartered in the basement of Jenike's house.
Split into simpler sentences: Four years later he was joined by Jerry Johanson, who had formerly worked with Jenike in graduate school. In 1966 Jenike incorporated the company Jenike & Johanson, Inc. The company was initially headquartered in the basement of Jenike's house.