Next up: John Deere invents a hydraulic rights managment (HRM) system that implements a communication protocol between hydraulic components using high frequency pressure changes in the hydraulic lines. These signals are interpreted by mechanical/hydraulic processing units to p̵r̵e̵v̵e̵n̵t̵ ̵t̵a̵m̵p̵e̵r̵i̵n̵g̵ ̵w̵i̵t̵h̵ ensure the quality of the product.