Thought this was very interesting
From the Idaho State Historical Society: http://www.idahohistory.net/sherwood.html
From the Idaho State Historical Society: http://www.idahohistory.net/sherwood.html
On February 19, 1907, Joseph Sherwood was granted U.S. Patent No. 844,963 for an "auto snow-car," devised to fight deep snow drifts and also provide hauling capabilities. He based his design on a horse-drawn four-runner sled. The front runners were used to steer and were controlled by a sprocket gear which could lift them up and over snowdrifts. The sleigh weighed less than a thousand pounds and may have reached speeds up to 12 miles per hour.