Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PEREZ GUASCH ANTONIO
Original Assignee
PEREZ GUASCH ANTONIO
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Filing date
Publication date
Application filed by PEREZ GUASCH ANTONIOfiledCriticalPEREZ GUASCH ANTONIO
Priority to ES0000425UpriorityCriticalpatent/ES425Y/es
Publication of ES425UpublicationCriticalpatent/ES425U/es
Application grantedgrantedCritical
Publication of ES425YpublicationCriticalpatent/ES425Y/es
Agricultural Chemicals And Associated Chemicals
(AREA)
Breeding Of Plants And Reproduction By Means Of Culturing
(AREA)
Abstract
La propiedad y la explotación exclusiva de un aparato aritmético constituido esencialmente por un marco en el cual está instalado un ábaco de cuentas y una pizarra amovible, de modo que pueda ser utilizada en combinación con el citado ábaco para realizar operaciones aritméticas o con fines de enseñanza.