Mechanical pencil capable of automatically propelling...
Mechanical pencil comprising a retractable lead guide
Mechanical pencil with movable cylinder and lead-protecting...
Mechanical pencil with sliding movable weight and lead...
Mechanical writing instrument
Mechanical writing instrument with a plurality of writing...
Mechanically controlled writing apparatus with pre-sharpened...
Mechanism for a writing instrument, writing instrument...
Mechanism for extruding and retracting a writing member of a...
Mechanism for writing instrument and writing instrument...
Metallic ink composition for wick type writing instruments
Method and apparatus for conducting machining operations
Method and apparatus for extruding writing instruments
Method and apparatus for securing nib in a writing instrument
Method for controlling writing instruments
Method for filling a cartridge with fluid and cartridge for...
Method for filling a cartridge with fluid and system for...
Method for forming a writing instrument with a compressible...
Method for the production of waxy chalk
Method of correcting typewritten impressions