US Patent: 369,499
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Pocket Rule
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Patentee:
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Edward R. Billings (exact or similar names) - New York, NY |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Nov. 10, 1886 |
Granted: |
Sep. 06, 1887 |
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Russ Allen.
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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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