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Hospital technicians around the world scrambled to nurse their p b eight forties along, keeping them in service. A common repair involves swapping a working screen out of a busted ventilator into a working ventilator with a busted screen. Screens are vinlock components, so the resulting perfectly functional device would not work until an authorized tech flew out to the hospital and typed in an unlock code. Thankfully, an anonymous polish ex metronic employe had kept the lock code generator from his previous job. And he cloned it, packaging the resulting gadget in whatever enclosures he could find, old guitar pedals, taple lamps and alarm clocks, and mailed them to med tex at hospitals