Geometrical instruments – Straightedge type – Base attached
Patent
1991-11-12
1992-10-20
Haroian, Harry N.
Geometrical instruments
Straightedge type
Base attached
83745, B43L 700, B27B 904
Patent
active
051559188
ABSTRACT:
A guide bar for use in providing a straight edge to make a metal cut, usually on steel with an oxyacetylene torch, which can be used both on flat stock and also across the open section or center web between the top and bottom plates of an I-beam.
REFERENCES:
patent: 2778383 (1957-01-01), Golasowski
patent: 3910146 (1975-10-01), Earl
patent: 4077292 (1978-03-01), Cole
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