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Individual
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Individual
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Application filed by IndividualfiledCriticalIndividual
Priority to ES0016263UpriorityCriticalpatent/ES16263Y/en
Publication of ES16263UpublicationCriticalpatent/ES16263U/en
Application grantedgrantedCritical
Publication of ES16263YpublicationCriticalpatent/ES16263Y/en
An expansive piston device for fountain pens, essentially characterized in that the piston itself is a pusher assembly, in which the expansive element is a rubber tube turned on itself, which is deployed or stretched by the effect of the thrust, occupying more volume inside the body of the pen. (Machine-translation by Google Translate, not legally binding)
ES0016263U1947-11-291947-11-29
Expansive plunger device for fountain pens.
ExpiredES16263Y
(en)