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The story
History
Joseph F. Keithley founded Keithley Instrument in 1946. His first product, the "Phantom Repeater," amplified low-level electric signals so that they could be measured by more standard equipment. The device was used by physicists, chemists, and engineers in the development of hearing aids and amplifiers. The product enjoyed some success in sales, but it was the next product, an electrometer, that clinched the future for Keithley's fledgling company.
Historical highlights
1946 – Founded in Cleveland, Ohio, U.S., by Joseph F. Keithley
1950 – First employee hired
John Yeager, the first employee, died 10 January 2018.
1964 – Moved headquarters to Solon, OH
1966 – German office opened
1967 – UK office opened
1991 – Joseph P. Keithley becomes chairman
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1995 – Listed on New York Stock Exchange
1998 – Taiwan office opened
2000 – Korea office opened
2003 – Santa Rosa, California RF Design center opened (sold to Agilent Technologies 2009)
2005 – Singapore office opened
2009 – S600 Series parametric test product line discontinued
2010 – Agreed to sell itself to the Danaher Corporation, many operations merged with Tektronix
2011 – Announcement that most manufacturing will shift from Ohio to China
From Wikipedia’s article on Keithley Instruments, shared under CC BY-SA 4.0.4