[Gllug] XOR

[Tethys]

Gordon Joly writes:

>>There's even a bogus patent on using XOR for cursor drawing IIRC.  See
>>John Walker's page about bogus patents:
>
> [...]
>
>But it what sense is it bogus?

In the sense that to be patentable, it has to be innovative, and not
obvious to an expert in that particular field (at least for US patents,
like the XOR one). Using XOR for a cursor had huge amounts or prior art,
and was thus not innovative. It is also immediately obvious to anyone
in the field (I worked it out when I was around 13, for example).

Tet
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