ES251969Y - A BLACKBOARD - Google Patents
A BLACKBOARDInfo
- 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
Links
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) |
-
1980
- 1980-07-08 ES ES1980251969U patent/ES251969Y/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES251969U (en) | 1980-11-01 |
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