| Patents for B43L 23 - Sharpeners for pencils or leads (1,940) |
|---|
| 01/31/1990 | CN2051899U Core shift pencil sharpener |
| 01/24/1990 | EP0351525A1 Combination pencil sharpener and eraser |
| 01/17/1990 | CN2051168U Pencil plane with pencil sharpener |
| 01/10/1990 | CN2050803U Pencil cutting appliance |
| 01/09/1990 | US4891881 Combined cutting tool and sharpener |
| 01/03/1990 | CN2050391U Rotary pencil sharpener |
| 01/03/1990 | CN2050390U Rotary pencil sharpener without cutting-off pencil lead |
| 12/20/1989 | CN2049605U Multifunction pencil sharpener |
| 12/13/1989 | CN2049191U Multiple point pencil reamer |
| 12/06/1989 | CN2048826U Lead protective pencil sharpener with good sharpening quality |
| 11/23/1989 | DE3815746A1 Device for sharpening a pencil |
| 11/22/1989 | CN2048030U Pencil sharpener with pencil lead protecting function |
| 11/22/1989 | CN2048029U Sharpener for pencils |
| 11/15/1989 | CN2047635U Pencil sharpener |
| 11/15/1989 | CN1037107A Novel pencil sharpener |
| 11/01/1989 | CN2046819U Pencil sharpener |
| 10/18/1989 | CN2046083U Pencil lead file finishing plane |
| 10/18/1989 | CN2046082U Project drawing pencil-sharpener |
| 09/27/1989 | CN2044939U Pencil sharpener of hardly to break off lead core |
| 08/23/1989 | CN2043193U Box for lead catching from grinding |
| 07/26/1989 | CN2041630U Electric knife for pencil |
| 07/05/1989 | CN2040445U Pencil sharpener with single hole and double blades |
| 06/27/1989 | CA1256340A1 Clip for pencil sharpener |
| 05/31/1989 | CN2038454U Rotary sharpener capable of saving pencil |
| 05/31/1989 | CN2038453U pencil sharpener |
| 05/17/1989 | CN2037685U Series of pencil sharpeners |
| 05/17/1989 | CN2037683U Multifunctional electric pen |
| 05/03/1989 | CN2036907U Electric sharpener for pencil lead |
| 04/12/1989 | CN2035716U Pencil sharpener |
| 03/29/1989 | CN2034913U Plastic automatic pencil-sharpener |
| 03/28/1989 | US4815507 Socket mounted pencil sharpener for cosmetic facial pencil |
| 03/23/1989 | DE3812252C1 Sharpener |
| 03/15/1989 | CN2034133U 铅笔刨 Pencil Sharpener |
| 03/01/1989 | CN2033347U 削笔器 Pencil sharpener |
| 02/22/1989 | CN2032948U Electric pencil-sharpening unit |
| 02/15/1989 | CN2032557U Sharpener capable of unbreaking pencil lead |
| 02/01/1989 | CN2031768U Convenient and practical pencil sharpener |
| 01/04/1989 | CN2030153U Folding pencil knife with frictional surface |
| 12/21/1988 | CN88203441U Pencil sharpener with multi-container and multi-sharp sword |
| 12/07/1988 | CN88203622U Pencil sharpener without breaking pencil lead |
| 12/01/1988 | WO1988009267A1 Applicator for soft materials |
| 11/16/1988 | CN87211203U Electric pencil-sharpener |
| 11/09/1988 | CN88210909U Pencil knife |
| 10/12/1988 | CN87102372A Pencil sharpener |
| 09/28/1988 | CN87214575U Multi-purpose pencil sharpener |
| 09/07/1988 | CN88200104U Pencil sharpener for thick pencil |
| 09/07/1988 | CN88100755A Pencil-sharpening device |
| 09/07/1988 | CN88100559A Multifunctional pencil sharpener |
| 08/18/1988 | DE3737863C1 Sharpener for pencils with a soft lead |
| 08/17/1988 | CN88203039U Pencil sharpener |
| 08/16/1988 | US4763415 Combined scissors and pencil sharpener |
| 08/10/1988 | CN87210198U Manual and electric driving pencil sharpener |
| 08/09/1988 | US4761885 Sharpener for compass leads and pencil leads |
| 07/26/1988 | US4759129 Pencil sharpener |
| 07/20/1988 | CN87213966U Imitation wood mechanical pencil made of plastics |
| 07/05/1988 | US4755074 Pencil sharpener |
| 06/15/1988 | CN86203764U Multifunctional pencil sharpener |
| 06/08/1988 | CN87207518U 多功能削铅笔刀 Multifunctional pencil sharpener |
| 05/17/1988 | US4744150 Container for tape ruler with manual pencil sharpener |
| 05/10/1988 | CA1236427A1 Lead sharpener press button for propelling pencils |
| 05/03/1988 | US4741105 Combined envelope opener and pencil sharpener unit |
| 04/06/1988 | CN87214025U All-round knife for sharping drawing pencil |
| 04/06/1988 | CN87205579U Pencil sharpener |
| 03/09/1988 | CN87207266U Non-breaking lead pencil sharpener |
| 03/09/1988 | CN86209382U Positional pencil sharpener |
| 03/01/1988 | US4727610 Multi-purpose stapler |
| 02/24/1988 | CN87204022U Multi-functional electric drawing pencil sharpener |
| 02/24/1988 | CN87200363U Multi-purpose pencil knife not to break lead |
| 02/17/1988 | CN87200853U Pencil sharpener |
| 02/10/1988 | CN86201863U Pencil lead sharpener |
| 02/10/1988 | CN86201727U Safe pencil knife with three blades |
| 02/03/1988 | CN86108284A Straight cutting type pencil knife with four edges |
| 01/20/1988 | CN87207734U Lead-grinding pencil sharpener |
| 12/23/1987 | CN86206917U Pencil sharpener with multi-edge |
| 12/23/1987 | CN86201092U Pencil sharpener with combined cutting edges |
| 12/02/1987 | CN87201962U Non-moment turning pencil knife with electronic music |
| 11/07/1987 | CN86202735U Pencil sharpener of a double-edged blade with grinding pattern surface |
| 10/31/1987 | CN86210562U Lead grinding type pencil sharpener |
| 10/31/1987 | CN86209717U Knife/file sharpener for pencil |
| 10/28/1987 | CN86202873U Pencil sharpener combined with geometrical drawing board |
| 08/19/1987 | CN86209174U Pencil sharpener with small taper hole |
| 07/22/1987 | CN86208854U Automatic adjustable pencil sharpener |
| 07/16/1987 | DE3600370A1 Clamping mechanism in a sharpening machine |
| 07/15/1987 | CN86210108U Pencil sharpener with setting device |
| 07/01/1987 | CN86207686U Multifunctional pencil sharpener with auxiliary blade |
| 06/24/1987 | CN86207324U Multipurpose pencil sharpener |
| 06/24/1987 | CN86205739U Box-type grinding tool for pencils |
| 06/03/1987 | CN86201060U 铅笔刨 Pencil Sharpener |
| 05/27/1987 | CN86203179U Pencil sharpener with knife locating feature |
| 05/20/1987 | CN86202858U 卷笔刀 Pencil sharpener |
| 05/13/1987 | CN86204833U Observable pencil sharpener |
| 03/04/1987 | CN86206476U Pencil sharpener |
| 02/26/1987 | WO1987001077A1 Self-adjusting pencil sharpener |
| 02/18/1987 | CN86105490A Automatically adjustable pencil cutter |
| 02/04/1987 | CN86201663U Pencil sharpener by rotation to turn and sharpen |
| 12/24/1986 | CN86204405U Knife for drawing pen |
| 12/24/1986 | CN86200111U Universal pen-knife |
| 11/26/1986 | CN86203413U Pencil lead breakless pencil sharpener |
| 11/04/1986 | US4620558 Device for shaving jacketed sticks |
| 10/29/1986 | CN85204581U Lead cutless pencil sharpener |