Most forum members will be familiar with the Noga tools, or their ‘clones’ … But:
I was tidying-up today, and remembered that one of my deburring tools carried a poorly-stamped patent number. … a quick photo and we have the patent:
**LINK**
https://worldwide.espacenet.com/patent/search?q=pn%3DUS2598443A
Filed in 1947, and granted in 1952
Probably of little or no interest to anyone except me.
MichaelG.
.
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Edited By Michael Gilligan on 17/09/2021 18:49:32