Lee Boysel

Lee Loren Boysel (December 31, 1938 – April 25, 2021^[1]) was an American electrical engineer and entrepreneur. While at Fairchild Semiconductor, he developed four-phase logic and built the first integrated circuit with over 100 logic gates, and designed the Fairchild 3800 / 3804 8-bit ALUs.^[2] Boysel designed the Four-Phase Systems AL1.^[3] He founded Four-Phase Systems to commercialize the technology, and sold the company to Motorola in 1981.

Lee Boysel
Born	(1938-12-31)December 31, 1938
Died	April 25, 2021(2021-04-25) (aged 82)
Education	MSEE 1963 BSEE 1962
Alma mater	University of Michigan
Occupation(s)	Entrepreneur Business executive Electrical engineer Investor
Known for	Founder of Four-Phase Systems, Inc.
Awards	University of Michigan Electrical & Computer Engineering Merit Award (2007)

He was a graduate of the University of Michigan.

Litigation

Texas Instruments claimed to have patented the microprocessor and, in response, Boysel assembled a system in which a single 8-bit AL1 was used as part of a courtroom demonstration computer system, together with ROM, RAM and an input-output device.^[4]