Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11999185 | Pencil sharpener | — | 2024-06-04 |
| 8769835 | Pencil sharpener and method of producing it | — | 2014-07-08 |
| 8042278 | Compasses writing implement | — | 2011-10-25 |
| 7363714 | Pencil sharpener | — | 2008-04-29 |
| 7225547 | Pencil sharpener | — | 2007-06-05 |
| 7036231 | Sharpener for an oval pencil | — | 2006-05-02 |
| 6976314 | Sharpener for soft-core pencils | — | 2005-12-20 |
| 6722803 | Self-cleaning pencil | — | 2004-04-20 |
| 6634108 | Sharpener for sharpening a soft-core pencil | — | 2003-10-21 |
| 6397479 | Sharpener, in particular for soft-core pencils | — | 2002-06-04 |
| 6381856 | Hand-held sharpener as a container-type sharpener | — | 2002-05-07 |
| 6334256 | Sharpener unit | — | 2002-01-01 |
| 6301791 | Sharpener for soft-core pencils | — | 2001-10-16 |
| 6286218 | Sharpener, in particular for soft-core pencils | — | 2001-09-11 |
| 6279237 | Sharpener | — | 2001-08-28 |
| 5894669 | Sharpener for soft core pencils | — | 1999-04-20 |
| 5845406 | Soft core pencil sharpener including cleaning shaper | — | 1998-12-08 |