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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:
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