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US Patent: 1,003,499
Support for Plumb-Bobs
Patentee: Henry Platt (exact or similar names) - Suffern, NY USPTO Classifications: 33/392 Tool Categories: layout tools : plumb bobs Assignees: None Manufacturer: Not known to have been produced Witnesses: Evelyn E. Haldeman Alfred S. Bush W. N. Woodson Juana M. Fallin	Patent Dates: Applied: Jul. 26, 1901 Granted: Sep. 19, 1911 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is a special jig designed to hold a plumb line while the first few rows of bricks are layed, and thus to short to plumb on their own.

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