Hand-held instrument for inspecting drill bits

Details Hand-held instrument for inspecting drill bits Hand-held instrument for inspecting drill bits

1979-05-21

1981-12-01

Corbin, John K.

350239, G02B 2124

Patent

active

043032990

ABSTRACT:
A hand-held instrument for examining a drill bit, comprising a stand of transparent material, a microscope mounted on the stand, and means carried by the stand for holding the drill bit in position to be viewed through the microscope when the instrument is held up to the eye of the user.

REFERENCES:
patent: 3167869 (1965-02-01), Raney et al.
patent: 3450458 (1969-06-01), Potrzuski

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