|
The ornamental design for a blackboard eraser, as shown. |
|||||||||||||||||
FIG. 1 is a perspective view;
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is a left-side elevational view;
FIG. 5 is a right-side elevational view;
FIG. 6 is a plan view; and,
FIG. 7 is a bottom view.
| Patent | Priority | Assignee | Title |
| 6772472, | Apr 09 2002 | Eraser having selectively openable and closable aperatures | |
| D480219, | Feb 24 2003 | LIFETIME BRANDS, INC | Brush |
| D505157, | May 25 2004 | Blackboard eraser and dust collecter | |
| D552682, | Nov 09 2004 | Societe Bic | Eraser for a white board |
| Patent | Priority | Assignee | Title |
| 3618153, | |||
| 4462134, | Dec 20 1982 | Blackboard eraser | |
| 4742594, | Sep 05 1986 | Blackboard eraser | |
| 4941225, | Nov 13 1989 | Automatic chalk-powder collecting device for blackboard eraser | |
| 131293, | |||
| 152146, | |||
| JP244898, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Date | Maintenance Fee Events |
| Date | Maintenance Schedule |