Geometrical instruments – Area integrators – Electrical
Patent
1980-03-26
1982-01-12
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
101127, B43L 1320
Patent
active
043098258
ABSTRACT:
A stencil for a design having an outline and a center blank, comprising a main stencil member and an auxiliary stencil member. The main member has an opening defining the design outline and the auxiliary member has a subtending portion registrable with the opening in the main member. An opening through the auxiliary member and the subtending portion defines the center blank.
REFERENCES:
patent: 329476 (1885-11-01), Miller
patent: 338621 (1886-03-01), Stines
patent: 1568864 (1926-01-01), Bahr
patent: 2066477 (1937-01-01), Levin
patent: 3465445 (1969-09-01), Fisher
patent: 3633286 (1972-01-01), Maurer
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