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- PATENT NUMBER 2,667,935
- Patent number 2,563,834.
- PATENT NUMBER 2,560,758 WITH REFERENCE PATENTS.
- Patent number 2,527,867.
- Patent number 2,474,140. Sheet 4.
- Patent number 2,474,140. Sheet 3.
- Patent number 2,474,140. Sheet 2
- Patent number 2,474,140. Page 4.
- Patent number 2,474,140. Page 3.
- Patent number 2,474,140. Page 2.
- Patent number 2,474,140. Page 1.
- Patent number 2,474,140.
- Patent number 2,219,229. Sheet 3.
- Patent number 2,219,229. Sheet 2.
- Patent number 2,219,229.