TW387348U - Water washing type automatic wiping device for a blackboard - Google Patents
Water washing type automatic wiping device for a blackboardInfo
- Publication number
- TW387348U TW387348U TW088206210U TW88206210U TW387348U TW 387348 U TW387348 U TW 387348U TW 088206210 U TW088206210 U TW 088206210U TW 88206210 U TW88206210 U TW 88206210U TW 387348 U TW387348 U TW 387348U
- Authority
- TW
- Taiwan
- Prior art keywords
- blackboard
- water washing
- type automatic
- wiping device
- washing type
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
- B43L21/02—Blackboard or slate cleaning devices with means for absorbing the chalk dust
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW088206210U TW387348U (en) | 1999-04-21 | 1999-04-21 | Water washing type automatic wiping device for a blackboard |
US09/552,291 US6266841B1 (en) | 1999-04-21 | 2000-04-19 | Automatic erasing device for erasing chalk marks on a writing board by water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW088206210U TW387348U (en) | 1999-04-21 | 1999-04-21 | Water washing type automatic wiping device for a blackboard |
Publications (1)
Publication Number | Publication Date |
---|---|
TW387348U true TW387348U (en) | 2000-04-11 |
Family
ID=21647176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW088206210U TW387348U (en) | 1999-04-21 | 1999-04-21 | Water washing type automatic wiping device for a blackboard |
Country Status (2)
Country | Link |
---|---|
US (1) | US6266841B1 (zh) |
TW (1) | TW387348U (zh) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6370720B1 (en) * | 1998-04-10 | 2002-04-16 | Jang Chang-Ho | Apparatus and a method for automatically erasing a blackboard |
US7242394B2 (en) * | 2003-06-02 | 2007-07-10 | Polyvision Corp. | Slidable electronic whiteboard system |
US8375505B2 (en) * | 2010-01-07 | 2013-02-19 | National Central University | Apparatus erasing blackboard through areas |
US8191197B1 (en) | 2010-04-22 | 2012-06-05 | Hunsucker Michael J | Non-permanent marker board eraser apparatus |
US10251472B1 (en) * | 2016-05-23 | 2019-04-09 | Dana P. Hervig | Infinity brush |
WO2018018381A1 (zh) * | 2016-07-25 | 2018-02-01 | 汤美 | 一种教育用黑板强力清洁装置 |
US20190313873A1 (en) * | 2018-04-12 | 2019-10-17 | Logan John Phillips | Automated Surface Cleaner |
CN112848765B (zh) * | 2021-03-17 | 2022-03-01 | 沈阳师范大学 | 一种自动擦黑板设备 |
CN114054392B (zh) * | 2021-11-16 | 2022-08-05 | 邵阳市科桥科技服务有限公司 | 一种基于教室一体机电脑用的除尘装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU656881A1 (ru) * | 1977-10-03 | 1979-04-15 | Хмельницкий Технологический Институт Бытового Обслуживания | Классна доска |
CA1059272A (en) * | 1977-11-08 | 1979-07-31 | Ray Agnesi | Electronic way to rapidly erase a blackboard |
US5319820A (en) * | 1993-01-28 | 1994-06-14 | Solomon Forst | Apparatus for cleaning blackboards |
US5649828A (en) * | 1994-06-29 | 1997-07-22 | Kiyoharu Kawashima | Writing board system |
US6073297A (en) | 1998-10-13 | 2000-06-13 | Lee; Chun-Hsien | Automatic erasing device for erasing chalk marks on a writing board |
-
1999
- 1999-04-21 TW TW088206210U patent/TW387348U/zh not_active IP Right Cessation
-
2000
- 2000-04-19 US US09/552,291 patent/US6266841B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6266841B1 (en) | 2001-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GD4K | Issue of patent certificate for granted utility model filed before june 30, 2004 | ||
MM4K | Annulment or lapse of a utility model due to non-payment of fees |