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US Patent: 369,499
Pocket Rule
Patentee: Edward R. Billings (exact or similar names) - New York, NY USPTO Classifications: 33/473 Tool Categories: layout tools : bevels rules : folding rules Assignees: None Manufacturer: Not known to have been produced Witnesses: H. A. West C. Sedgwick	Patent Dates: Applied: Nov. 10, 1886 Granted: Sep. 06, 1887 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Folding rule with a pivoting plate fixed at one end and sliding in a slot in the other leg to allow the rule be set and locked in position.

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