Geometrical instruments – Scriber – Parallel line
Patent
1989-12-22
1991-07-23
Haroian, Harry N.
Geometrical instruments
Scriber
Parallel line
33 2703, B43L 904, B43L 1302
Patent
active
050331973
ABSTRACT:
For applicators of panel board and/or dry wall, a combination tool which replaces three conventional applicator's tools, namely a T-square, a circle marker and a linear marker.
REFERENCES:
patent: 1740597 (1929-12-01), Hoyer
patent: 2529210 (1950-11-01), Butler
patent: 2681507 (1954-06-01), Underwood
patent: 2818644 (1958-07-01), Crawford
patent: 3174225 (1965-03-01), Abraham
patent: 3286351 (1966-11-01), McAlister
patent: 3439426 (1969-04-01), Wilson
patent: 4334360 (1982-06-01), Burns et al.
Haroian Harry N.
Olsson Frederick J.
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