TANGENT FITTER INCLUDING A STRAIGHT EDGE AND AN IMAGE SPLITTING ELEMENT
United States Patent 3481039
US Patent References:
Geometrical instrument
- - 1907873


Inventors:
Kantz, Melvin R.
Publication Date:
12/02/1969
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Assignee:
MONSANTO RES CORP
Primary Class:
33/471
Other Classes:
359/834, 356/150
International Classes:
B43L13/00; G06G1/00; B43L13/00; B43L7/00




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