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Class Information
Number: 33/27.05
Name: Geometrical instruments > Scriber > Curved line > Circle forming roller
Description: Subject matter which includes two circular members having different diameters joined by a connecting member to have their centers on a common axis and a scribing member supported by the connecting member.


Patents under this class:

Patent Number Title Of Patent Date Issued
RE33654 Drafting device Aug. 6, 1991
4823475 Drafting device Apr. 25, 1989
4680864 Drawing guide Jul. 21, 1987
4586265 Perspective drawing apparatus May. 6, 1986



 
 
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