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Mechanical Pencil - Ontify
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Mechanical Pencil
Clutch Pencil
Writing implement.
Wikipedia | Mechanical Pencil
Statements about
Mechanical Pencil
External Pages About Mechanical Pencil
KBpedia
Subreddit
Subclass Of
Writing Implement
Pencil
Commons Gallery
Mechanical Pencil
Uses
Replacement
Image
Has Characteristic
Inception
1790s
1822
Discoverer or Inventor
Criterion Used
:
Patent
Sampson Mordan
Criterion Used
:
Patent
Extension
Uses
:
Mechanism
Line Weight
Has Characteristic
:
Constancy
John Isaac Hawkins
Criterion Used
:
Patent
Class of Object(s) of Occurrence
:
Pencil Lead
Class of Object(s) of Occurrence
:
Pencil Lead
Wikidata
