Geometrical instruments – Straightedge type – Plural straightedges nonadjustably fixed at right angles
Patent
1979-06-28
1980-05-27
Martin, Jr., William D.
Geometrical instruments
Straightedge type
Plural straightedges nonadjustably fixed at right angles
331845, 33191, G01B 310
Patent
active
042043352
ABSTRACT:
An instrument for locating and positioning prints, pictures or pictorial displays of all kinds on a flat support.
REFERENCES:
patent: 778521 (1904-12-01), Wheat
patent: 2118747 (1938-05-01), Vest
patent: 2821027 (1958-01-01), Billhimer
patent: 3156984 (1964-11-01), Palmer
Grossman Morris G.
Levy Edward D.
Meisner Edward H.
Falcon Safety Products, Inc.
Martin, Jr. William D.
Sonnekalb, Jr. William F.
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