Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Welcome to Mechanical Pencil Sharpeners!
Welcome to our mechanical pencil sharpener forum. Feel free to browse threads on gear trains, cutter materials, crank handles, patents, and collection records, and share observations from sharpeners you have examined or documented.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
Documented Sharpener Patents
Discuss documented sharpener patents, including drawings, claims, dates, and what patent records reveal about designs.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.