CA933681A - Communication system for classroom use and the like - Google Patents

Communication system for classroom use and the like

Info

Publication number
CA933681A
CA933681A CA131040A CA131040A CA933681A CA 933681 A CA933681 A CA 933681A CA 131040 A CA131040 A CA 131040A CA 131040 A CA131040 A CA 131040A CA 933681 A CA933681 A CA 933681A
Authority
CA
Canada
Prior art keywords
communication system
classroom use
classroom
communication
Prior art date
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.)
Expired
Application number
CA131040A
Other versions
CA131040S (en
Inventor
E. Abel William
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA131040A priority Critical patent/CA933681A/en
Application granted granted Critical
Publication of CA933681A publication Critical patent/CA933681A/en
Expired legal-status Critical Current

Links

CA131040A 1967-04-10 1971-12-23 Communication system for classroom use and the like Expired CA933681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA131040A CA933681A (en) 1967-04-10 1971-12-23 Communication system for classroom use and the like

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US62964167A 1967-04-10 1967-04-10
CA15192 1968-03-18
CA131040A CA933681A (en) 1967-04-10 1971-12-23 Communication system for classroom use and the like

Publications (1)

Publication Number Publication Date
CA933681A true CA933681A (en) 1973-09-11

Family

ID=25665811

Family Applications (1)

Application Number Title Priority Date Filing Date
CA131040A Expired CA933681A (en) 1967-04-10 1971-12-23 Communication system for classroom use and the like

Country Status (1)

Country Link
CA (1) CA933681A (en)

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