ES77750A1 - Improved teaching device. - Google Patents
Improved teaching device.Info
- Publication number
- ES77750A1 ES77750A1 ES77750A ES77750A ES77750A1 ES 77750 A1 ES77750 A1 ES 77750A1 ES 77750 A ES77750 A ES 77750A ES 77750 A ES77750 A ES 77750A ES 77750 A1 ES77750 A1 ES 77750A1
- Authority
- ES
- Spain
- Prior art keywords
- teaching device
- improved teaching
- improved
- teaching
- 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 |
---|---|---|---|
ES77750A ES77750A1 (en) | 1921-03-31 | 1921-03-31 | Improved teaching device. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES77750A ES77750A1 (en) | 1921-03-31 | 1921-03-31 | Improved teaching device. |
Publications (1)
Publication Number | Publication Date |
---|---|
ES77750A1 true ES77750A1 (en) | 1921-06-01 |
Family
ID=64247666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES77750A Expired ES77750A1 (en) | 1921-03-31 | 1921-03-31 | Improved teaching device. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES77750A1 (en) |
-
1921
- 1921-03-31 ES ES77750A patent/ES77750A1/en not_active Expired
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