| Patents for B43L 23 - Sharpeners for pencils or leads (1,940) |
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| 08/05/1992 | CN2111863U Pencil sharpener without breaking lead |
| 07/29/1992 | CN2111208U Pencil sharpener |
| 07/29/1992 | CN1063076A Automatic pencil with auto-sharpener and its fabrication process |
| 07/22/1992 | CN2110582U Adjustable pen shape sharpener for drawing pencil |
| 07/15/1992 | CN2109952U Doulble-awl pencil sharpener |
| 07/08/1992 | CN2109321U Electric pencil sharpener |
| 07/01/1992 | CN2108636U Pencil sharpener capable of sharpening long lead core |
| 06/17/1992 | CN2107389U Multiple knife pencil sharpener |
| 06/15/1992 | WO1992010372A1 Eraser cleaning tool |
| 06/15/1992 | CA2075999A1 Eraser cleaning tool |
| 05/27/1992 | CN2105414U Pensil sharpener |
| 05/27/1992 | CN2105413U Rotary pensil grinding sharpener |
| 05/20/1992 | CN2104770U Two-edged, long-taper pencil sharpener |
| 05/20/1992 | CN2104769U Safety children's pencil sharpener |
| 05/20/1992 | CN2104768U Copying pencil sharpener |
| 05/13/1992 | CN2104141U Tilted cutting pen-knife |
| 04/29/1992 | CN2102856U Pencil sharpener |
| 04/22/1992 | CN2102205U Safety pencil sharpener |
| 04/08/1992 | CN2100992U Pencil sharpener |
| 03/18/1992 | CN2099039U Pencil sharpener |
| 03/18/1992 | CN2099038U Pencil sharpener |
| 03/11/1992 | CN2098395U Sharper for pencil |
| 02/19/1992 | CN2096481U Pencil sharpener |
| 01/29/1992 | CN2094462U Hand hold fixed position pencil sharpener |
| 01/22/1992 | CN2093766U Pull-type sharpener for pencils |
| 01/15/1992 | CN2093103U 铅笔刨 Pencil Sharpener |
| 01/08/1992 | CN2092447U Lead-adjusting type pencil sharpener |
| 01/07/1992 | US5077903 Carpenter's pencil sharpener |
| 12/31/1991 | US5076527 Sucking on device which is easily to be lifted but is not easily getting overturned |
| 12/27/1991 | EP0462332A1 Pencil holders |
| 12/11/1991 | CN2090335U Front-positioning pencil sharpener capable of freely replacing blade |
| 11/27/1991 | CN2089417U Dual-side and two-direction rotary pencil sharpener |
| 11/27/1991 | CN2089416U 铅笔刀 Pencil sharpener |
| 10/30/1991 | CN2087573U 卷笔刀 Pencil sharpener |
| 10/16/1991 | CN2086674U Pencil sharpener against breaking lead |
| 10/16/1991 | CN2086673U Book for sharping lead of pencil by grinding |
| 10/01/1991 | US5052453 Structure of pencil sharpener |
| 09/25/1991 | CN2085312U Electric pencil sharpener with core grinding wheel |
| 09/25/1991 | CN2085311U 铅笔刨 Pencil Sharpener |
| 09/10/1991 | US5046876 Safety tipped pencil and sharpener therefor |
| 09/04/1991 | CN2084015U Double purpose pencil sharpener |
| 09/04/1991 | CN2084014U Multipurpose cutting blade for sharpening pencil |
| 09/04/1991 | CN2084013U Electric sharpener for pencil |
| 08/21/1991 | CN2083119U Lead-protected pencil sharpener |
| 08/20/1991 | US5040256 Combination tape measurer and sharpener |
| 08/14/1991 | CN2082688U Pencil sharpener |
| 08/14/1991 | CN2082687U Pencil sharpener with position hole |
| 08/14/1991 | CN2082686U Pencil sharpener for engineering drafting |
| 07/31/1991 | CN1053392A Pencil sharpener |
| 07/17/1991 | CN2080913U 铅笔刀 Pencil sharpener |
| 07/10/1991 | EP0436169A1 Sharpener |
| 07/10/1991 | CN2080475U Multifunction pencil sharpener |
| 07/10/1991 | CN2080474U Hand pencil sharpener |
| 07/10/1991 | CN2080473U Multifunction electric pencil sharpener |
| 07/03/1991 | CN2080031U 电动削笔器 Electric pencil sharpener |
| 06/26/1991 | CN2079576U Sharpener for pencils |
| 05/29/1991 | DE3932586A1 Pencil sharpener with blade clamped in place - has blade clamped by lug projecting from sidewall sharpener |
| 05/29/1991 | CN2077805U Pencil sharpener |
| 05/08/1991 | CN2076501U Multifunctional pencil knife |
| 04/24/1991 | CN2075599U Elastic axis direction pencil sharpening device |
| 04/17/1991 | EP0422671A1 Universal crayon sharpener |
| 04/10/1991 | CN2074715U Two awl pencil sharpener |
| 04/03/1991 | CN2074250U Double-edge blade of pencil sharpener |
| 03/20/1991 | EP0368842A4 Applicator for soft materials |
| 03/20/1991 | CN2073373U Combined pen-knife |
| 03/20/1991 | CN2073372U Auto-rotating pen-knife |
| 03/06/1991 | CN2072485U Pencil-sharpening unit with sound |
| 02/13/1991 | CN2071135U Electric pencil sharpener for drawing |
| 02/12/1991 | US4991299 Universal crayon sharpener |
| 02/06/1991 | CN2070684U Sharpener for pencil with long lead |
| 01/30/1991 | CN2070253U 铅笔刨 Pencil Sharpener |
| 01/30/1991 | CN2070252U Pencil sharpener |
| 01/23/1991 | CN2069797U Pencil sharpener |
| 01/16/1991 | CN2069358U Non-breaking lead pen-knife with twisting and scraping double-blade |
| 01/09/1991 | CN2068920U Pencil sharpener with black lead protection |
| 12/19/1990 | CN2067651U 铅笔刀 Pencil sharpener |
| 11/28/1990 | CN2066393U Multi-cavity poly-forming-angle planer tool for sharpening pencil |
| 11/28/1990 | CN2066392U Reciprocating type planer tool for sharpening pencil |
| 11/14/1990 | CN2065570U Rapid cutting blade changing multifunction pencil sharpener |
| 11/07/1990 | CN2065153U Pencil sharpener |
| 10/30/1990 | US4966208 Pencil sharpener |
| 10/24/1990 | CN2064311U Multi-function pencil-knife |
| 10/09/1990 | US4961451 Sharpener for rectangular pencils |
| 09/19/1990 | CN2062287U Pencil sharpener with counter for children |
| 09/12/1990 | CN2061904U 简易铅笔刀 Simple pencil sharpener |
| 09/05/1990 | CN2061527U Pencil sharpener |
| 09/05/1990 | CN2061526U Automatic pencil sharpener |
| 08/29/1990 | CN2061129U Multifunctional rotating pencil sharpener |
| 08/29/1990 | CN2061128U Pencil sharpener |
| 08/22/1990 | CN2060738U Pencil sharpener with pencil lead protecting and bits catching |
| 08/22/1990 | CN2060737U Sharpener for pencils |
| 06/19/1990 | US4934057 Multi-blade pencil-core sharpener |
| 06/02/1990 | CA2004413A1 Pencil holders |
| 05/23/1990 | EP0368842A1 Applicator for soft materials. |
| 04/24/1990 | US4918816 Pencil sharpener |
| 04/18/1990 | CN2056128U 自动粉笔套 Automatic chalk sets |
| 03/28/1990 | CN2055099U 削铅笔刀 Pencil sharpener |
| 02/07/1990 | CN2052358U Electrical pencil sharpener |
| 02/01/1990 | DE3824883A1 Sharpener for soft lead pencils |
| 01/31/1990 | CN2051900U Non-breaking lead pencil sharpener |