<P> In 1989, Deere replaced the 6620, 7720, and 8820 with a new line of completely redesigned' Maximizer' combines that included the 9400, 9500, and 9600 walker combines . These combines were completely redesigned and featured a center - mounted cab, rear - mounted engine, and more comforts in the cab . Also in 1989, Deere was inducted into the National Inventors Hall of Fame . In 1997, Deere celebrated 50 years of self - propelled combine production, and the 1997 models featured a 50th - anniversary decal . In 1998, the 9410, 9510, and 9610 were introduced . These were essentially the same machines, but with minor upgrades . Deere dealers offered' 10 series' upgrades to owners of older 9000 series Maximizer combines . In 1999, Deere introduced the 50 series Maximizer combines . These machines featured significant cosmetic upgrades including a more streamlined appearance, improved ergonomics in the cab, PTO shaft - style header hook - up, and the larger models were available as rotary machines which were a complete departure from the combines that Deere had built in the past . </P> <P> In the late 1970s, International Harvester had pioneered rotary combines with their Axial flow machines, and were soon followed by other manufacturers, but Deere continued to build only conventional walker combines through the 1980s and 1990s . In 1999, John Deere introduced the Single - Tine Separation (STS) system on its 9550, 9650, and 9750 combines, representing a step forward in rotary combine technology . The STS system uses less horsepower and improves material handling . </P> <P> As of 2014, Deere & Company employed about 67,000 people worldwide, of which half are in the United States and Canada, and is the largest agriculture machinery company in the world . In August 2014, the company announced it was indefinitely laying off 600 of its workers at plants in Illinois, Iowa, and Kansas due to less demand for its products . Inside the United States, the company's primary locations are its administrative center in Moline, Illinois, and manufacturing factories in central and southeastern United States . As of 2016, the company experiments with an electric farm tractor . </P> <P> The logo of the leaping deer has been used by this company for over 155 years . Over the years, the logo has had minor changes and pieces removed . Some of the older style logos have the deer leaping over a log . The company uses different logo colors for agricultural vs. construction products . The company's agricultural products are identifiable by a distinctive shade of green paint, with the inside border being yellow . While the construction products are identifiable by a shade of black with the deer being yellow, and the inside border also being yellow . </P>

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