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...
Pump system for moistener nozzle
Push-button for ball applicator tip and assembly forming a...
Pushbutton mechanical pencil with extendable lead adjustments
Pushpin retaining device and method of retaining without...
Re-usuable adhesive pad
Reconfigurable tabbing apparatus
Refill mechanism for writing instrument
Refill unit for a writing instrument
Refillable ink ribbon cartridge
Removable cap of writing instrument
Removable cap of writing instrument
Removable highlighter tape and dispenser
Renewable cap attached to a writing instrument