I think at some point Ford would have no longer had a patent to exclude other builders. It used to be that patents were issued for a maximum of seven years and a renewal process to go through after that. It's not automatic that the US Patent Office renews a patent. I think if Deere really wanted to they could have pushed Ford-Ferguson on the rockshaft portion of the three point hitch design and I do not know just how unique the parallel linkage aspect was or was not. If think Case had no issue coming out with its Eagle hitch system despite the similarities to the Ferguson hitch. Back to Deere I wonder how much they valued the three point hitch system when it first came out as they experimented with a torque amplifier type hi-low then did nothing as far as putting that into production.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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