Comment by defrost

> their patent on "using electrical signals to detect contact with arbor mounted saws" which does not expire until 2037.

I'm curious about when that was filed and whether there's an Australian patent on "using electrical signals to detect close contact and then stop machine ripping through flesh" from ~1982 (ish) for a sheep shearing robot.

Tangential prior art exists (as is common with many patents) but it's always a long drawn out bunfight that largely only laywers win to engage in patent disputes.