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US Patent: 434,608
Coin controlled strength testing machine
Patentees: Alfred W. Roovers (exact or similar names) - Brooklyn, NY Alexander H. Roovers (exact or similar names) - Brooklyn, NY USPTO Classifications: 194/281, 73/379.04, 73/379.06 Tool Categories: Assignees: None Manufacturer: Not known to have been produced Witnesses: Edwin H. Brown S. O. Edmonds	Patent Dates: Applied: Dec. 04, 1889 Granted: Aug. 19, 1890 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen

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