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US Patent: 756,949
Spirit Level
Patentee:
Robert B. Ferguson (exact or similar names) - Los Angeles, Los Angeles County, CA

USPTO Classifications:
33/383, 33/388

Tool Categories:
layout tools : levels : spirit levels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Dec. 19, 1902
Granted: Apr. 12, 1904

Patent Pictures:
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