ES64090A1 - Slate pencil-blackboard. - Google Patents
Slate pencil-blackboard.Info
- Publication number
- ES64090A1 ES64090A1 ES64090A ES64090A ES64090A1 ES 64090 A1 ES64090 A1 ES 64090A1 ES 64090 A ES64090 A ES 64090A ES 64090 A ES64090 A ES 64090A ES 64090 A1 ES64090 A1 ES 64090A1
- Authority
- ES
- Spain
- Prior art keywords
- blackboard
- slate pencil
- slate
- pencil
- 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 |
---|---|---|---|
ES64090A ES64090A1 (en) | 1917-03-13 | 1917-03-13 | Slate pencil-blackboard. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES64090A ES64090A1 (en) | 1917-03-13 | 1917-03-13 | Slate pencil-blackboard. |
Publications (1)
Publication Number | Publication Date |
---|---|
ES64090A1 true ES64090A1 (en) | 1917-05-01 |
Family
ID=64236888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES64090A Expired ES64090A1 (en) | 1917-03-13 | 1917-03-13 | Slate pencil-blackboard. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES64090A1 (en) |
-
1917
- 1917-03-13 ES ES64090A patent/ES64090A1/en not_active Expired
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