who is the actual mfr and where can I find a legitimate IFU for patterson ultrasonic cleaners

Do anyone know who the actual mfr is? and where there is an actual IFU or operation manual, with maintenance schedule listed? patterson's website is a sad, sad attempt. What they list as an IFU has no real instruction and their operation's manual is their attempt at a how to of ultrasonic cleaning, nothing to do with the actual device.