Combined spirit level and angle-indicated device

Details Combined spirit level and angle-indicated device Combined spirit level and angle-indicated device

1987-12-14

1990-10-16

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03113418

REFERENCES:
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patent: 4648185 (1987-03-01), Brandimarte
patent: 4805315 (1989-02-01), Nesbitt

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