Portable mini parallel rule

Portable retractable erasable writing surface

Positioning device

Press-type pencil

Pressure sealer serrated sealing roll

Pressure sealer three tiered sealing roll configuration

Pressurized cartridge for a writing instrument

Pressurized pen

Pressurized writing instrument employing a compressible...

Process for manufacturing a writing or coloring pencil by...

Process for the continuous production of pencils

Production of engine-divided scales

Production of helical rulings

Production of rulings such as those of diffraction gratings

Progressive stencil set and method of drawing

Projection-retraction mechanism for a writing instrument

Propelling pencil

Propelling pencil

Propelling pencil

Propelling pencil, especially for large diameter black or...