LU49784A1LU49784ALU49784ALU49784A1LU 49784 A1LU49784 A1LU 49784A1LU 49784 ALU49784 ALU 49784ALU 49784 ALU49784 ALU 49784ALU 49784 A1LU49784 A1LU 49784A1
Authority
LU
Luxembourg
Application number
LU49784A
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 filedfiledCritical
Priority to LU49784ApriorityCriticalpatent/LU49784A1/xx
Publication of LU49784A1publicationCriticalpatent/LU49784A1/xx
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B3/00—Manually or mechanically operated teaching appliances working with questions and answers
G09B3/02—Manually or mechanically operated teaching appliances working with questions and answers of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student
G09B3/04—Manually or mechanically operated teaching appliances working with questions and answers of the type wherein the student is expected to construct an answer to the question which is presented or wherein the machine gives an answer to the question presented by a student of chart form