In this artical, you can find a research we made about the first patent of the pencil sharpener.
Link
That link heads to one of the first pencil sharpener patents available on the internet. It is not an exact copy of our product, it has a different design on the exterior and inside ,the mechanism,.
The patented pencil sharpener is very similar to this daily usage sharpener. It has a much simpler design than ours.
Link
That link heads to one of the first pencil sharpener patents available on the internet. It is not an exact copy of our product, it has a different design on the exterior and inside ,the mechanism,.
The patented pencil sharpener is very similar to this daily usage sharpener. It has a much simpler design than ours.
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