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Patent:US3481452

Patent:	US 3481452
Titel:	PICKIOS DRAFTSMAN KIT
Datum:	01.12.1969
Ort:	Jamaica (N.Y.)
Land:	USA
Person:	Anthony G. Pickios
Firma:
Links im Rechnerlexikon:	Fraction of an Inch Adding Machine and FractronCalculator.jpg
Schlagworte:
Link zum Patentamt: (ohne Garantie)	US3481452 (espacenet),  US3481452 (uspto)

In order for the draftsman to make convenient and quick conversions of the numerical fractions, such as half inch, quarter inch measurements, etc., to whole numbers, a fractional calculator may also be provided on the lower portion of the frame means