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Hickok Electrical Instrument Co. is an electronics company founded in 1910 by Robert D. Hickok Sr. in Cleveland, OH. They are still in business but nowadays are mainly active in the automotive test equipment area.

From 1959 until the late 1960s, Hickok and other companies (Lavoie Laboratories, Jetronic Industries) produced unauthorized copies of Tektronix equipment under military contracts.

Tektronix sued the US government and Hickok in February 1961. The action was not settled (in their favour) until May 1970, with final payment made only in early 1979 at just over $4 million.


Model Class Series Description Introduced Discontinued
Hickok 1805A Oscilloscope 500-series scopes 30 MHz oscilloscope (?) (?)
Hickok 1822 Plug-in 500-series scopes Clone of Tektronix Type B (?) (?)
Hickok 1823 Plug-in 500-series scopes Dual-trace amplifier (Clone of Tektronix Type C) 1959 (?)
Hickok 1831 Plug-in 500-series scopes Dual-trace amplifier (?) (?)
Hickok 1832 Plug-in 500-series scopes Tektonix Type L clone (?) (?)
Hickok 1836 Plug-in 500-series scopes 500-series plugin (?) (?)
Hickok AN/USM-81 Oscilloscope 500-series scopes Tube oscilloscope (?) (?)
Hickok AN/USM89B Oscilloscope 300-series scopes 4 MHz oscilloscope (?) (?)