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US Patent: 1,429,625
Compasses
Patentee:
Heinrich Perrot (exact or similar names) - Calw, Germany

USPTO Classifications:
33/558.5

Tool Categories:
layout tools : compasses

Assignees:
None

Manufacturer:
Heinrich Perrot - Württemberg, Germany

Witnesses:
E. Schleicher
Fr. Klieber
Patent Dates:
Applied: Dec. 29, 1919
Granted: Sep. 19, 1922

Patent Pictures: [ 1 | 2 ]
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Description:
This set of compasses features an unusual locking mechanism and a micro-adjust leg.

Known Examples marked "Perrot Württemberg, USA Pat. Applied For".

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