Driftless SW Wisconsin | No, I did not work on the "conical rotary" design you pictured. That design work was just prior to my time there. I am familiar with that design however and I worked with the people who had been on that project. I think you will see the names of Ed and John as inventors. I believe that is a situation where Deere DID file for a patent as you show but well after deciding NOT to put it in production...it was a "dead" project by the 1977 date shown on your picture. Jim at Dawn
Edited by Jim 1/17/2011 23:09
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John Deere's Rotary Design work prior to 1962.
