John Deere didn't invent the technology though, Autonomous Solutions Inc. (ASI) did. They partnered in ~2000.
http://www.asirobots.com/news/
http://www.asirobots.com/news/
> The Beeline Navigator was developed in 1993 by Australian engineer, Rob Mailer. [1]
[1] http://www.queenslandcountrylife.com.au/news/agriculture/mac...
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> "NavCom's involvement with Deere & Company began with Deere's GreenStar precision farming system in 1994 and has expanded into many areas of Deere's product activities. The commitment by the most senior Deere management to information systems leadership motivated the NavCom shareholder-employees to join with Deere & Company,"
http://www.prnewswire.com/news-releases/deere--company-acqui...