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Article #9315

Re: postscript copyrights

#9315
From: Ian Kemmish
Date: Tue, 02 Mar 1999 00:00
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In article <none-ya02408000R0203990909430001@nntp.news.netcom.net>, 
none@nospam.spam says...
>
>In article <36DBEA81.DC99B8FB@visual-design.com>, root
><caroli@visual-design.com> wrote:
>
>> I plan to write a postscript-interpreter (like ghostview) for a
>> commercial product. Does anybody know, if I have to expect any legal
>> problems (eg. paying rents, copyright limitations)?
>
>At the very least, you will be required to license the right to
>encode/decode LZW compressed data from Unisys. Because you are working with
>PostScript, it will cost you significantly more than it would otherwise.
>That has been our experience, in any event.

We give our OEMs the option of generating an `invalidaccess' error if a page 
description attempts to open an LZW filter.  I've never seen a real-world page 
description that uses LZW -- it may be possible to coax photoshop into 
producing such a file, but I've never tried....

More interesting these days is finding a patent-free way of doing colour 
managment or halftoning:-)

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Ian Kemmish                   18 Durham Close, Biggleswade, Beds SG18 8HZ, UK
ian@five-d.com                Tel: +44 1767 601 361
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Behind every successful organisation stands one person who knows the secret
of how to keep the managers away from anything truly important.
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From: ian@five-d.com (Ian Kemmish)
Subject: Re: postscript copyrights
Date: 1999/03/02
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