Maxon is the brand name used by the Nisshin Onpa company of Japan for its line of effects pedals designed for guitar and bass.
Nisshin Onpa started mid-1960s as a producer of components and OEM products for guitar companies.
They created a fuzz-wah pedal that was very popular, and marketed under multiple trade names including Ibanez.
Nisshin Onpa designed and manufactured the popular TS-808/TS808 and TS9 Tube Screamers for Ibanez from 1974 until 2002, and many other devices including the FL9 Flanger, CS9 Chorus, and AD9 Analog Delay.
Most of the old Ibanez Nine Series is available in Maxon form, but the pedals include improved circuitry such as true-bypass switching.