I was asked if it was possible to recover used chalk by someone and I found this.
I find it kinda funny that someone to lazy to walk around the table or keep track of their chalk would have enough time to get a patent like this done.. but well here is it.
https://patents.google.com/patent/US6726573
Anybody seen this gizmo around?
I find it kinda funny that someone to lazy to walk around the table or keep track of their chalk would have enough time to get a patent like this done.. but well here is it.
https://patents.google.com/patent/US6726573
Anybody seen this gizmo around?