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Re: Legal GIF Encoding
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Re: Legal GIF Encoding


  • Subject: Re: Legal GIF Encoding
  • From: Alexandra Milton <email@hidden>
  • Date: Sun, 18 Jul 2004 15:36:53 +0200

I got this off the Unisys webpage:

------------------------------------------------------------------------ ------------
LZW Patent Information


License Information on GIF and Other LZW-based Technologies

Unisys U.S. LZW Patent No. 4,558,302 expired on June 20, 2003, the counterpart patents in the United Kingdom, France, Germany and Italy expired on June 18, 2004, the Japanese counterpart patents expired on June 20, 2004 and the counterpart Canadian patent expired on July 7, 2004.

Unisys Corporation holds and has patents pending on a number of improvements on the inventions claimed in the above-expired patents. Information on these improvement patents and terms under which they may be licensed can be obtained by contacting the following:

Unisys Corporation
Welch Patent Licensing Department
Mail Stop E8-114
Unisys Way
Blue Bell, PA  19424

Via the Internet, send email to email@hidden.

Via facsimile, send inquiries to Welch Patent Licensing Department at 215-986-3090.

The above is presented for information purposes only, and is subject to change by Unisys. Additionally, this information should not be considered as legally obligating Unisys in any way with regard to license availability, or as to the terms and conditions offered for a license, or with regard to the interpretation of any license agreements. You should consult with your own legal counsel regarding your particular situation.



2004-07-18 kl. 14.12 skrev Andrew Lindesay:

Hello;

Does anybody know what the status is regarding writing out GIF's from an application (eg: a WOA)? Compuserve has held a patent over the modified LZW algorithm for some time. I hear it's expired on the 7th July, but there's no talk of it having expired?

[PS: I know about writing PNGs -- it's just not always what's required unfortunately]

cheers.

___
Andrew Lindesay
http://www.lindesay.co.nz/
021 47 0929
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References: 
 >Legal GIF Encoding (From: Andrew Lindesay <email@hidden>)

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