ES251969Y - A BLACKBOARD - Google Patents

A BLACKBOARD

Info

Publication number
ES251969Y
ES251969Y ES1980251969U ES251969U ES251969Y ES 251969 Y ES251969 Y ES 251969Y ES 1980251969 U ES1980251969 U ES 1980251969U ES 251969 U ES251969 U ES 251969U ES 251969 Y ES251969 Y ES 251969Y
Authority
ES
Spain
Prior art keywords
blackboard
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
ES1980251969U
Other languages
Spanish (es)
Other versions
ES251969U (en
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 filed Critical
Priority to ES1980251969U priority Critical patent/ES251969Y/en
Publication of ES251969U publication Critical patent/ES251969U/en
Application granted granted Critical
Publication of ES251969Y publication Critical patent/ES251969Y/en
Expired legal-status Critical Current

Links

ES1980251969U 1980-07-08 1980-07-08 A BLACKBOARD Expired ES251969Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES1980251969U ES251969Y (en) 1980-07-08 1980-07-08 A BLACKBOARD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES1980251969U ES251969Y (en) 1980-07-08 1980-07-08 A BLACKBOARD

Publications (2)

Publication Number Publication Date
ES251969U ES251969U (en) 1980-11-01
ES251969Y true ES251969Y (en) 1981-04-16

Family

ID=8409852

Family Applications (1)

Application Number Title Priority Date Filing Date
ES1980251969U Expired ES251969Y (en) 1980-07-08 1980-07-08 A BLACKBOARD

Country Status (1)

Country Link
ES (1) ES251969Y (en)

Also Published As

Publication number Publication date
ES251969U (en) 1980-11-01

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