| ReturnTo Theme-Group-Choice | Onelevelup |
| 2C353 | Mechanical pencils and projecting and retracting systems therefor, and multi-system writing instruments | |
| B43K21/00 -21/26;24/00-24/18,130;27/00-27/12 | ||
| B43K21/00-21/26;24/00-24/18,130 | FA | FA00 WRITING-CORE FEEDING PROCESSES FOR MECHANICAL |
FA01 | FA02 | FA04 | FA05 | FA06 | FA07 | FA08 | FA09 | FA10 | |
| . Methods for operation | . . Rotation or turning | . . Tapping | . . Head-tapping | . . Side-tapping | . . Push-buttons | . . Longitudinal sliding | . . . Backwards movement of the sliding component | . . . Advancing of the remaining writing-core | ||||
| FA11 | FA12 | FA13 | FA16 | FA17 | FA18 | |||||||
| . . Curving and bending | . . Shaking | . . Automatic feeding | . Operating members | . . Clips | . . Head-protection caps | |||||||
| FC | FC00 WRITING-CORE FEEDING MECHANISMS FOR MECHANICAL PENCILS |
FC01 | FC02 | FC03 | FC04 | FC05 | FC06 | FC07 | ||||
| . Spiral mechanisms | . . Single writing cores | . . Multiple writing cores | . . Writing-core support members attached to protuberances | . . . Ejection of writing-core remnants using plungers | . . . Means for prevention of overwinding | . . Screw-mounted writing-core support members | ||||||
| FC11 | FC12 | FC13 | FC14 | FC15 | FC18 | FC19 | FC20 | |||||
| . Chuck mechanisms | . . Fixed chucks | . . Advancing and retracting chuck systems | . . Writing-core holder systems or drop systems | . . Multiple chucks | . . Characteristic elements | . . . Chucks | . . . Structural members other than the chuck per se | |||||
| FC21 | FC22 | FC26 | FC27 | FC28 | FC30 | |||||||
| . . . Structural-member materials | . . . Shape and structure | . Cam mechanisms | . Ratchets | . Turning elements for writing-core propulsion | . Drive sources | |||||||
| FE | FE00 MECHANICAL PENCIL PARTS, CONNECTIONS, AND DEVICES |
FE01 | FE02 | FE03 | FE04 | FE05 | FE06 | FE07 | FE08 | FE09 | FE10 | |
| . Shaft tubes | . Shaft caps | . Writing-core protection tubes | . . Sliding means | . Writing-core retention members | . Writing-core cases | . . Multiple writing-core chambers | . . Cartridge systems | . Caps for writing-core cases | . Pins for ejecting writing-core remnants | |||
| FE11 | FE13 | FE14 | FE15 | FE16 | FE18 | FE19 | FE20 | |||||
| . Protective caps for pencil tips | . Connecting structures | . . Shaft caps and tubes | . . Chucks and writing-core cases | . . Shaft caps or shaft tubes and internal parts and structures | . Devices for cushioning excessive writing pressure | . Volume-adjustment devices for writing-core feeding | . Display devices | |||||
| FG | FG00 ADDITIONAL FUNCTIONS OF MECHANICAL PENCILS |
FG01 | FG02 | FG03 | FG05 | FG06 | FG07 | FG09 | FG10 | |||
| . Prevention of writing-core breakage | . . Prevention of shock or vibration | . Storage of the writing core | . Prevention of writing-core feeding due to malfunction | . Shortening of writing-core remnants | . Prevention of blockage due to writing-core waste and writing-core waste ejection | . Mechanical pencils capable of using writing-cores of differing sizes and shapes | . Automatic replenishment of the writing-core | |||||
| FG11 | FG12 | FG13 | FG15 | FG17 | FG18 | |||||||
| . Prevention of shaking or looseness of internal structures | . Solid mounting of fixed elements | . Prevention of screw-element looseness | . Wide opening of the chuck when not in use | . Extensible overall length | . Storage of writing-core protection tubes | |||||||
| HA | HA00 TYPES OF PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HA01 | HA02 | HA03 | HA04 | HA05 | HA06 | HA07 | HA08 | HA09 | HA10 | |
| . Single systems | . Multiple systems | . . Dual-head systems | . Types of writing units | . . Similar types (i.e., multiple systems) | . . Mechanical pencils | . . Pens | . . . Fountain pens | . . . Ballpoint pens | . . . Aqueous ink pens | |||
| HC | HC00 OPERATION OF SINGLE-SYSTEM PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HC01 | HC02 | HC04 | HC05 | HC06 | HC07 | HC09 | HC10 | |||
| . Operating methods | . . Rotation or turning movement | . . End-tapping systems | . . Head-tapping systems | . . Side-tapping system | . . Push-button systems | . . Pulling systems | . . Longitudinally sliding systems | |||||
| HC12 | HC13 | HC15 | HC16 | HC17 | HC18 | |||||||
| . . Upright or slanting systems | . . Curving or bending systems | . Operating members | . . Different members for projection and retraction | . . Clips | . . Head-protection caps | |||||||
| HE | HE00 OPERATION AND SELECTION OF MULTI-SYSTEM PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HE01 | HE02 | HE03 | HE05 | HE06 | HE07 | HE08 | ||||
| . Same means for selection and projection | . Different means for selection and projection | . No means for selection | . Selection control | . . Rotational and turning systems | . . End-tapping system | . . Tilting systems | ||||||
| HE11 | HE12 | HE13 | HE14 | HE15 | ||||||||
| . Projection and retraction control | . . Rotational and turning systems | . . End-tapping systems | . . Longitudinally sliding systems | . . . Interlocking systems | ||||||||
| HG | HG00 MECHANISMS FOR PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HG01 | HG03 | HG04 | HG05 | HG07 | HG08 | HG10 | ||||
| . Spiral mechanisms | . Cam mechanisms | . . Saw-tooth cams | . . Heart-shaped cams | . Chuck mechanisms | . Rack-and-pinon mechanisms | . Electrical or magnetic means | ||||||
| HJ | HJ00 PARTS, CONNECTIONS, AND DEVICES FOR PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HJ01 | HJ02 | HJ03 | HJ05 | HJ07 | HJ09 | |||||
| . Single writing elements | . Writing-element support members | . Shaft caps and tubes | . Connecting structures | . Display devices | . Devices for cushioning excessive writing pressure | |||||||
| HJ11 | HJ12 | HJ13 | HJ14 | HJ15 | HJ16 | |||||||
| . Dryness-prevention devices | . . Closing of single writing elements or shaft-tube heads | . . . Writing components not in contact with closed members | . . . Use of notched closed members | . . . Use of single-opening closed elements | . . . Use of dual-opening closing elements | |||||||
| HL | HL00 ADDITIONAL FUNCTIONS OF PROJECTING AND RETRACTING WRITING INSTRUMENTS |
HL01 | HL03 | HL05 | ||||||||
| . Prevention of clothing stains | . Prevention single writing-element vibration or looseness | . Extensible overall length | ||||||||||
| B43K27/00-27/12 | KA | KA00 TYPES OF MULTI-SYSTEM WRITING INSTRUMENTS |
KA01 | KA02 | KA04 | KA05 | KA07 | KA09 | ||||
| . Vertical column systems | . Horizontal column systems | . Dual-head systems | . Single-head systems | . Separable variants | . Multi-color or heterogenous variants | |||||||
| KA11 | KA12 | KA13 | KA14 | KA15 | KA16 | KA17 | KA18 | KA19 | KA20 | |||
| . Types of single writing elements | . . Elements of the same kind | . . Elements of different kinds | . . Mechanical pencils | . . Pencils (i.e., including leads) | . . Pens | . . . Fountain pens | . . . Ballpoint pens | . . . Felt pens, marking pens, and signing pens | . . . Aqueous ink pens | |||
| B43K21/00-21/26;24/00-24/18,130;27/00-27/12 | MA | MA00 USE OF WRITING INSTRUMENTS FOR PURPOSES OTHER THAN WRITING |
MA01 | MA02 | MA03 | MA06 | MA07 | |||||
| . Plotting devices, automatic drawing machines, or recording devices | . Drawing | . Cosmetics | . Erasers | . Sharpeners | ||||||||
| MC | MC00 MANUFACTURE AND REPAIR |
MC01 | MC02 | MC04 | MC05 | MC07 | MC08 | MC09 | MC10 | |||
| . Mechanical pencils | . Projecting and retracting writing instruments | . Methods | . Devices | . Integration | . Integrated designs and reduction of the number of parts | . Ease of assembly and use | . Ease of disassembly |