Portable magnetic drafting board

Details Portable magnetic drafting board Portable magnetic drafting board

1992-11-25

1994-09-06

Crowder, Clifford D.

Geometrical instruments

Straightedge type

33430, 33DIG1, B43L 1302

Patent

active

053436253

ABSTRACT:
A drafting board includes a base, a shoulder formed in the perimeter of the upper surface of the base, a magnetic board engaged in the shoulder of the base, two holes formed in the bottom surface of the base, and a rod engaged in each of the holes of the base for elevating the upper edge of the base. The upper edge is located higher than the lower edge and the base is supported by the rods in a sloped fashion.

REFERENCES:
patent: 2763241 (1956-09-01), Waggoner
patent: 3093919 (1963-06-01), Holtz
patent: 3332399 (1967-07-01), Patrick et al.
patent: 3672062 (1972-06-01), Baker
patent: 3746992 (1973-07-01), Serembe
patent: 4138818 (1979-02-01), Hebel
patent: 4146976 (1979-04-01), Zambiasi
patent: 4611406 (1986-09-01), Engstrom et al.
patent: 4654762 (1987-03-01), Lauerick
patent: 4934061 (1990-06-01), Knight et al.
patent: 5012586 (1991-05-01), Ashworth

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