Boring
Welcome | What’s New?
Site Map | Usage Note

Become a Contributor
Really Boring
What is a Leadholder?
Leadholder History
Leadholder Mechanics
Leadholder Database
Yawn
References
Contributors
Leadholder Links
Contact D. B. Smith

United States Patent 2,785,657 “Adjustable Pencil Sharpener” 1953-1957

date of application
date granted
inventor
assignee
patent holder country
1953 May 22
1957 March 19
Walter Wolfson

United States