SG116491A1 - Wireless blackboard eraser and dust collector. - Google Patents
Wireless blackboard eraser and dust collector.Info
- Publication number
- SG116491A1 SG116491A1 SG200302352A SG200302352A SG116491A1 SG 116491 A1 SG116491 A1 SG 116491A1 SG 200302352 A SG200302352 A SG 200302352A SG 200302352 A SG200302352 A SG 200302352A SG 116491 A1 SG116491 A1 SG 116491A1
- Authority
- SG
- Singapore
- Prior art keywords
- dust collector
- blackboard eraser
- wireless
- wireless blackboard
- eraser
- Prior art date
Links
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG200302352A SG116491A1 (en) | 2003-04-24 | 2003-04-24 | Wireless blackboard eraser and dust collector. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG200302352A SG116491A1 (en) | 2003-04-24 | 2003-04-24 | Wireless blackboard eraser and dust collector. |
Publications (1)
Publication Number | Publication Date |
---|---|
SG116491A1 true SG116491A1 (en) | 2005-11-28 |
Family
ID=35542880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG200302352A SG116491A1 (en) | 2003-04-24 | 2003-04-24 | Wireless blackboard eraser and dust collector. |
Country Status (1)
Country | Link |
---|---|
SG (1) | SG116491A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1801620A (en) * | 1928-06-11 | 1931-04-21 | Sanford S Bettman | Vacuum board eraser |
FR1184699A (en) * | 1957-09-13 | 1959-07-24 | Device for erasing blackboards with absorption of chalk dust | |
GB910383A (en) * | 1960-02-29 | 1962-11-14 | Salo David Rand | Improvements in or relating to vacuum cleaners |
US4204298A (en) * | 1977-11-18 | 1980-05-27 | Hiroyuki Handa | Compact vacuum cleaner |
FR2573699A1 (en) * | 1984-11-28 | 1986-05-30 | Lobez Sagues Manuel | Device for erasing writing from blackboards |
US5537711A (en) * | 1995-05-05 | 1996-07-23 | Tseng; Yu-Che | Electric board cleaner |
WO2003002358A1 (en) * | 2001-06-29 | 2003-01-09 | Yulong Wang | Eraser selectively openable and closable apertures |
US20030037404A1 (en) * | 2001-08-23 | 2003-02-27 | Wu Tung Ming | Electronic blackboard eraser |
-
2003
- 2003-04-24 SG SG200302352A patent/SG116491A1/en unknown
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1801620A (en) * | 1928-06-11 | 1931-04-21 | Sanford S Bettman | Vacuum board eraser |
FR1184699A (en) * | 1957-09-13 | 1959-07-24 | Device for erasing blackboards with absorption of chalk dust | |
GB910383A (en) * | 1960-02-29 | 1962-11-14 | Salo David Rand | Improvements in or relating to vacuum cleaners |
US4204298A (en) * | 1977-11-18 | 1980-05-27 | Hiroyuki Handa | Compact vacuum cleaner |
FR2573699A1 (en) * | 1984-11-28 | 1986-05-30 | Lobez Sagues Manuel | Device for erasing writing from blackboards |
US5537711A (en) * | 1995-05-05 | 1996-07-23 | Tseng; Yu-Che | Electric board cleaner |
WO2003002358A1 (en) * | 2001-06-29 | 2003-01-09 | Yulong Wang | Eraser selectively openable and closable apertures |
US20030037404A1 (en) * | 2001-08-23 | 2003-02-27 | Wu Tung Ming | Electronic blackboard eraser |
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