A Transistor Museum Interview with Jack Haenichen The Development of the 2N2222 – The Most Successful and Widely Used Transistor Ever Developed.
Oral History – Jack Haenichen (Continued) Jack Haenichen Semiconductor Patents 1)  3,226,611  Filed: Aug 23, 1962.  Granted: Dec 28, 1965. “Semiconductor Device” 2)  3,226,612  Filed: March 18, 1963.  Granted: Dec 28, 1965. “Semiconductor Device and Method” 3)  3,226,613  Filed: March 18, 1963.  Granted: Dec 28, 1965. “High Voltage Semiconductor Device” 4)  3,226,614  Filed: Nov 4,  1963. Granted: Dec 28, 1965. “High Voltage Semiconductor Device” 5)  3,309,245  Filed: Aug 23, 1962. Granted: Mar 14, 1967. “Method for Making a Semiconductor Device” 6)  3,309,246  Filed:  Nov 4, 1963. Granted: Mar 14, 1967. “Method for Making a High Voltage Semiconductor Device” 7)  3,473,979  Filed:  Jan 29, 1963. Granted: Oct 21, 1969. “Semiconductor Device” ______________ Go To Haenichen Oral History, Page 17 Use This Link For Additional Information on the 2N2222	Oral History – Jack Haenichen (Continued) These Audio Links are Excerpts from the Nov 15, 2006 Interview  with Jack Haenichen. Arriving at Motorola in 1959 Jack Haenichen Audio Clip #1 Motorola’s Semiconductor Operation in the Late 1950s Jack Haenichen Audio Clip #2 Working on Early Silicon Transistors at Motorola Jack Haenichen Audio Clip #3 Motorola Mesa Transistors Jack Haenichen Audio Clip #4 Comments on the Discovery of the Annular Process Jack Haenichen Audio Clip #5 ______________
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