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Individual
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Individual
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Priority to ES9402634UpriorityCriticalpatent/ES1029225Y/en
Publication of ES1029225UpublicationCriticalpatent/ES1029225U/en
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Publication of ES1029225YpublicationCriticalpatent/ES1029225Y/en
Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments
(AREA)
Abstract
Instrument to trace spiral, comprising a shank having a screw thread along the surface with respect to the rotating rod for tapping a spiral plotter. (Machine-translation by Google Translate, not legally binding)
ES9402634U1994-10-181994-10-18
INSTRUMENT FOR PLACING SPIRALS.
Expired - LifetimeES1029225Y
(en)