Class B43L : ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING
Subclass 1/08: Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Blackboards (easels or stands for blackboards A47B 97/04) flexible
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11731451 | Retractable boundary apparatus and system | Jan 27, 21 | Aug 22, 23 | COMSERO, INC. |
| 10926576 | Retractable boundary apparatus and system | Sep 21, 18 | Feb 23, 21 | COMSERO, INC. |
| 9403400 | Modular portable writing and projection system having variable curvature | Aug 20, 10 | Aug 02, 16 | THE BOSTON CONSULTING GROUP, INC. |
| 9044995 | Reflection frame-equipped sheet | Jan 16, 12 | Jun 02, 15 | HITACHI SOLUTIONS, LTD. |
| 8915745 | Method and apparatus for forming a writable erasable area on an object | Sep 12, 13 | Dec 23, 14 | CORNING INCORPORATED |
| 5305114 | Electronic blackboard apparatus | Jul 02, 92 | Apr 19, 94 | MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0150,295 | REUSABLE CHALKBOARD KIT | Nov 12, 21 | May 18, 23 | Not available |
| 2019/0084,344 | RETRACTABLE BOUNDARY APPARATUS AND SYSTEM | Sep 21, 18 | Mar 21, 19 | COMSERO, INC. |
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