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PROSPER ALPHONSE DEWIT
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PROSPER ALPHONSE DEWIT
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Application filed by PROSPER ALPHONSE DEWITfiledCriticalPROSPER ALPHONSE DEWIT
Application grantedgrantedCritical
Publication of FR523083ApublicationCriticalpatent/FR523083A/fr
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B19/00—Teaching not covered by other main groups of this subclass
G09B19/02—Counting; Calculating
Landscapes
Business, Economics & Management
(AREA)
Engineering & Computer Science
(AREA)
Entrepreneurship & Innovation
(AREA)
Physics & Mathematics
(AREA)
Educational Administration
(AREA)
Educational Technology
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General Physics & Mathematics
(AREA)
Theoretical Computer Science
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FR523083A1920-08-261920-08-26Perfectionnements aux tableaux d'enseignement
ExpiredFR523083A
(fr)