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US Patent: 509,096
Caliper for Measuring Distances
Patentee:
Charles W. Preston (exact or similar names) - San Francisco, CA

USPTO Classifications:
33/542.1, 33/704

Tool Categories:
layout tools : measurement gauges : surface gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. A. Brandau
Wilson D. Bent, Jr.
Alfred A. Enquist

Patent Dates:
Applied: Jun. 17, 1893
Granted: Nov. 21, 1893

Patent Pictures:
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