Drafting apparatus

Details Drafting apparatus Drafting apparatus

1990-11-14

1992-01-07

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

33434, 33DIG1, B43L 1314

Patent

active

050779044

ABSTRACT:
A drafting apparatus comprising a drawing board having at least two opposite, parallel sides, and arcuate guide means, detachably coupled to the at least two opposite, parallel sides, for guiding a straight edge along a radial path during formation of radiating perspective lines.

REFERENCES:
patent: 21336 (1858-08-01), Hansell
patent: 1122533 (1914-12-01), Ogilvie
patent: 1705330 (1929-03-01), Martinelli et al.
patent: 2568575 (1951-09-01), Wickman
patent: 2581839 (1952-01-01), Douglas
patent: 2667694 (1954-02-01), McQuaid
patent: 3389470 (1968-06-01), Johnson
patent: 3464117 (1969-09-01), Johnson
patent: 3881253 (1975-05-01), Haws

Affiliated with

Also associated with

Rating

Drafting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drafting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drafting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-812808