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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PEREZ GUASCH ANTONIOfiledCriticalPEREZ GUASCH ANTONIO
Priority to ES0000425UpriorityCriticalpatent/ES425Y/en
Publication of ES425UpublicationCriticalpatent/ES425U/en
Application grantedgrantedCritical
Publication of ES425YpublicationCriticalpatent/ES425Y/en
Agricultural Chemicals And Associated Chemicals
(AREA)
Breeding Of Plants And Reproduction By Means Of Culturing
(AREA)
Abstract
The ownership and exclusive exploitation of an arithmetic apparatus consisting essentially of a frame in which an abacus of beads and a removable blackboard is installed, so that it can be used in combination with the aforementioned abacus to perform arithmetic operations or for teaching purposes . (Machine-translation by Google Translate, not legally binding)