Patents
Sitemap › B43 - Writing or drawing implements; Bureau accessories › B43K - Implements for writing or drawing › B43K 21 - Propelling pencils
Patents for B43K 21 - Propelling pencils (2,215)
08/1989
08/09/1989CN2042412U Rotary adjustable pencil
08/02/1989CN1034331A Knock type mechanical pencil
07/1989
07/04/1989US4844639 Push-type writing instrument
06/1989
06/28/1989EP0321581A1 Writing utensil
06/20/1989US4840508 Mechanical pencil capable of automatically propelling successive lengths of lead
06/13/1989US4838721 Automatic lead advance for mechanical pencils
06/13/1989CA1255629A1 Mechanical pencil
06/06/1989US4836703 Lead cartridge opening and closing unit
05/1989
05/17/1989CN2037680U 多功能活动铅笔 Multifunctional pencil
05/10/1989EP0315337A1 Mechanical pencil
05/03/1989EP0314393A1 Pencil mechanism
05/03/1989DE3735512A1 Druckminenstift Pressure pencil
04/1989
04/26/1989CN2036489U Pushed type propelling pencil
04/12/1989EP0311121A1 Writing tool
04/12/1989EP0310799A1 Propelling instrument for marking with a soft material lead
04/12/1989CN2035709U Propelling pencil
04/06/1989DE3732027A1 Writing instrument
04/05/1989CN2035317U Simple propelling pencil
03/1989
03/28/1989US4815880 Card type writing instrument
03/22/1989CN2034524U Automatic writing-core feeding mechanism for propelling pencil
03/09/1989WO1989001877A1 Fine-lead propelling pencil
03/08/1989EP0305872A1 Mechanical pencil
02/1989
02/28/1989US4809023 Automatic pencil device for automatic drafting and writing machines
02/21/1989US4806038 Knock type mechanical pencil connection
02/15/1989EP0303127A1 Device with a screw and nut element, and use of this device
02/08/1989EP0302532A1 Lead cartridge with an openable capping structure
02/01/1989CN2031762U Front-press type automatic pencil
02/01/1989CN2031761U Writing-core breaking-prevention pulse pencil
02/01/1989CN1030721A Pencil with movable core
12/1988
12/29/1988WO1988010198A1 Writing utensil
12/14/1988EP0294823A1 Swing-type mechanical pencil
12/01/1988WO1988009267A1 Applicator for soft materials
11/1988
11/23/1988EP0291866A1 Knock-action Mechanical Pencil
11/22/1988US4786196 Pencil with a tapered follower
10/1988
10/26/1988CN87214620U Auto-compensated adjustable pencil useing impact
10/19/1988EP0287237A1 Mechanical pencil
10/19/1988CN88200995U Propelling pencil with continous cores
09/1988
09/21/1988CN88200914U Simple moving-pencil
08/1988
08/31/1988EP0280220A1 Instrument propelling a bar-shaped article
08/03/1988EP0276362A1 Mechanical pencil with an automatically propelled lead
07/1988
07/20/1988CN87213966U Imitation wood mechanical pencil made of plastics
07/20/1988CN87209760U Drawing pencil with ball-point
07/06/1988CN87208775U Pencil with movable pencil lead and eraser
07/05/1988US4755075 Writing implement with tip having attaching projections
06/1988
06/15/1988EP0271249A1 Rotary knock type mechanical pencil
06/01/1988DE3639892A1 Writing instrument with a ball-point-pen refill or pencil lead
06/01/1988CN87205907U Automatic pencil with rubber
05/1988
05/25/1988EP0268398A1 Lead chuck of mechanical pencil
03/1988
03/23/1988CN87213383U Movable pencil with sharpener
03/09/1988EP0259120A1 Lead cartridge for mechanical pencil
03/08/1988US4729684 Mechanical pencil
03/02/1988CN87201597U Dual-purpose moving pencil with moving rubber
02/1988
02/11/1988DE3641432C1 Apparatus for writing and drawing with rotating lead
02/10/1988CN86204564U 绘图铅笔 Pencil drawing
02/10/1988CN86202424U H-b drawing pencil-exchanging unit
02/09/1988CA1232572A1 Pencils
01/1988
01/19/1988US4720203 Push-button type mechanical pencil
12/1987
12/22/1987US4714365 Mechanical pencil
12/22/1987CA1230581A1 Dispensing device
12/16/1987CN86211115U Automatic pencil
12/10/1987DE3618602A1 Holder for rod-shaped articles
11/1987
11/18/1987CN86205003U Square lead pencil needless to sharpen
11/17/1987US4706995 Bookmark/writing instrument combination
11/10/1987US4705419 Mechanical pencil with automatic lead advance
11/10/1987US4704797 Drawing device for use in a drafting machine and a drawing pencil used therewith
10/1987
10/27/1987US4702634 Continuous feed mechanical pencil with push button lead feed actuator
10/14/1987CN87200734U Eraser-changeable propelling pencil
09/1987
09/23/1987CN86207468U Core retractable pencil
09/10/1987DE3705097A1 Pen with writing refill
09/09/1987CN86207600U Pulse propeller for propelling pencil lead
09/03/1987DE3606717A1 Lead insert for compass and shaft extension for this purpose
08/1987
08/18/1987US4687363 Mechanical pencil and method for assembling the same
08/12/1987EP0231893A1 Writing instrument
06/1987
06/30/1987US4676684 Lead delivery mechanism for mechanical pencil
05/1987
05/20/1987CN86205038U Twelve-color automatic pen
05/13/1987CN86101523A Fixed children's pencil
04/1987
04/22/1987EP0219001A1 Mechanical pencil
04/21/1987US4659242 Lead loading mechanical pencil
04/15/1987CN86203221U Movable drawing pencil with flat lead
04/14/1987US4657421 Mechanical pencil
03/1987
03/25/1987EP0215584A1 Lead feed mechanism for mechanical pencil
03/24/1987CA1219555A1 Mechanical pencil
03/17/1987US4650359 tubular casing
03/11/1987EP0213621A1 Drawing device for use in a drafting machine and drawing pencil used therewith
03/11/1987EP0213275A1 Automatic mechanical pencil
02/1987
02/26/1987DE3546418C1 Füllminenstift mit axial beweglichem Minenführungsrohr. Pencil with axially movable leadguide.
02/11/1987CN86104332A Telescopic pen
02/04/1987EP0210350A1 Mechanical pencil
02/04/1987EP0210280A1 Eversharp pencil
02/04/1987CN85205526U Multipurpose fast change colour pen
01/1987
01/13/1987US4635338 Method and apparatus for assembling an automatic and disposable pencil
12/1986
12/23/1986US4630953 Pencil holder
12/09/1986US4627756 Lead propelling mechanism for a mechanical pencil
11/1986
11/26/1986EP0202942A1 Lead cartridge with an openable capping structure
11/26/1986CN86202490U Adjustable mapping pencil
11/04/1986US4620811 Mechanical pencil
10/1986
10/28/1986US4619539 Mechanical pencil equipped with lead-storing cartridge
10/08/1986EP0196381A1 Lead propelling mechanism for a mechanical pencil
09/1986
09/10/1986CN85201137U Pencil with adjustable lead
09/09/1986US4610557 Mechanical pencil with groove and lug structure
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