ES89654Y - Blackboard - Google Patents

Blackboard

Info

Publication number
ES89654Y
ES89654Y ES89654U ES89654U ES89654Y ES 89654 Y ES89654 Y ES 89654Y ES 89654 U ES89654 U ES 89654U ES 89654 U ES89654 U ES 89654U ES 89654 Y ES89654 Y ES 89654Y
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
ES89654U
Other languages
Spanish (es)
Other versions
ES89654U (en
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 ES89654U priority Critical patent/ES89654Y/en
Publication of ES89654U publication Critical patent/ES89654U/en
Application granted granted Critical
Publication of ES89654Y publication Critical patent/ES89654Y/en
Expired legal-status Critical Current

Links

ES89654U 1961-10-19 1961-10-19 Blackboard Expired ES89654Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES89654U ES89654Y (en) 1961-10-19 1961-10-19 Blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES89654U ES89654Y (en) 1961-10-19 1961-10-19 Blackboard

Publications (2)

Publication Number Publication Date
ES89654U ES89654U (en) 1961-12-01
ES89654Y true ES89654Y (en) 1962-04-01

Family

ID=52713598

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89654U Expired ES89654Y (en) 1961-10-19 1961-10-19 Blackboard

Country Status (1)

Country Link
ES (1) ES89654Y (en)

Also Published As

Publication number Publication date
ES89654U (en) 1961-12-01

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