Mr. Zerks Mansion was in Kenosha, Wisconsin, and still stands, he was the Bill gates of the early 1900's and his zerk was an I-pod of the day.
Now all we get are kitchen magicians and juicers for inventions.
http://jeep.us41.org/lube/rightwheel.jpg
And by the way, Ian, that excavator was built in America, with an Iowa engine, a German hydraulic pump, and American Boom and arm and bucket and hydralic rams and hoses. I think Hitachi built the basic undercarriage. 5000 amazing trouble free hours, and one bucket of dirt is your day with a shovel. can place a rock the size of a volkswagon like a toothpick.