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First recognized
the first patent for pencil sharpeners happened then...Bernard Lassimonne was the one who did this...This sharpener had small metal files set at 90 degrees in a block of wood and it grinded the edges of the pencil’s tip. This method wasn’t any faster or easier than sharpening with a knife, so it didn’t become popular -
Trial Period
This is the time between the first one and its soon to be 2.0 version
1829-1846 -
Recognizable modern-ish form
was made in a more recognizable form in 1847 by...Thierry Des Estivaux -
Trial period of 48-95
This is when version 3.0 is on the rise during 1848 and 1895 -
Walter K. Foster
improved the last design to look like this -
A.B. Dick Planetary Pencil Pointer
solved a problem the ones before it had not, making it more useful -
1996-1997
This is the magical time period where it took only a year to come up with version 4.0 -
Love Sharpener
A.B. Dick Planetary Pencil Pointer -
Olcott Climax Pencil Sharpener
milling disks with a cylindrical cutting head with spiral cutting edges in the same planetary mechanism that was used in Pencil Pointer
