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- PATENT NUMBER 2,560,758 WITH REFERENCE PATENTS.
- Patent number 2,219,229. Sheet 3.
- Patent number 2,219,229. Sheet 2.
- Patent number 2,219,229.
- Patent number 2,219,229.
- Patent 2,341,384. Sheet 2 of 3.
- Patent 2,341,384. Page 3of 3.
- Patent 2,341,384
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- Page 4.
- Page 3.
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- One of two EMD diesel engines in the Tug Boat John Purves.