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United States Patent 2,188,130 “Point Forming Device for the Leads of Pencils and the Like” 1939–1940

date of application
date granted
inventor
assignee
patent holder country
1939 June 26
1940 January 23
Georg Baier and Georg Köppel

Germany
patent employed on
 
Alvin 5555   Alvin 5000
This design is the forerunner of the mechanism used in the Alvin 5000 and 5555 lead pointers. The Alvin pointers use a much simpler version of this design, but retain the distinctive blade assembly shown in this patent.