Orchid XP v8 wrote:
> But what if I use the DFT to compress an image, but in a slightly 
> different way to JPEG? Or if I compress the data in exactly the same 
> way, but format the output file slightly differently? And just how 
> different does it have to be?

That's why you read the patent. If you do every clause of one of the claims 
of the patent, then you're infringing the patent.  Take a look at "claim 1" 
of a patent some time.

> Question: If CDMA is patented, how come cell phones exist?

Because the patent owner licenses the patents.

> I wonder, how well do legal professionals actually understand computers?

That's why you need an engineering degree to be a patent officer in the US. 
You have basically people who took a bachelor's in computers and a masters 
in law, or vice versa.

-- 
   Darren New, San Diego CA, USA (PST)
   Insanity is a small city on the western
   border of the State of Mind.

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