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Patents for Thomas Spackman | |||||
Number | Date | Patentee | Title | Type | |
649,357 | May 08, 1900 | W.H. Ridgway | Hoisting apparatus | hoists, winches, come-alongs | |
833,632 | Oct. 16, 1906 | W.H. Ridgway | Steam hydraulic hoist | hoists, winches, come-alongs |