From: Ralf Quint <freedos...@gmail.com>

On 8/1/2016 2:14 PM, TJ Edmister wrote:
> On Mon, 01 Aug 2016 05:24:30 -0400, dmccunney <dennis.mccun...@gmail.com>
> wrote:
>
>> More to the point, who *needed* it?
>>
>> MNG is PNG with support for animation.  PNG was created to be a
>> graphics format unencumbered by patents.
> If GIF was patent encumbered, then it would seem that anyone who wanted
> support for animation in an unencumbered format "needed" MNG.
GIF was indeed covered by several patents from Unisys, in particular the
LZW compression, which all ran out in 2004...
https://en.wikipedia.org/wiki/GIF#Unisys_and_LZW_patent_enforcement

Ralf

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