Between 1822 and 1874, more than 160 patents were registered pertaining to a variety of improvements to mechanical pencils.
Over the years obtained many patents for mechanical pencils and pencil manufacturing processes.
Mechanical pencils are popular for their longevity and the fact that they may never need sharpening.
While many artists use traditional wood pencils, others prefer mechanical pencils or drafting leads.
He helped pioneer the use of plastics to make mechanical pencils.
These pen mods can either be made by combining parts from different pens and/or mechanical pencils, or by buying modded pens online.
Mechanical pencils are used to provide lines of constant thickness without sharpening in technical drawing and writing.
The company developed many writing instruments, including forerunners of the modern mechanical pencils, and the earliest stylographic pens.
