From andreas.berglund@home.se Fri, 24 Sep 1999 01:01:50 +0200
Date: Fri, 24 Sep 1999 01:01:50 +0200
From: Andreas Berglund andreas.berglund@home.se
Subject: [Patents] Re: [Patents] La =?iso-8859-1?Q?conf=E9rence?= de l'OMPI
 =?iso-8859-1?Q?d=E9bouche?= sur un copieux plan d'action

Bernard Lang wrote:

> contains a report on the Unisys GIF business. But you all know it.
>
> It got me to wonder however. Why did Unisys wait so long to enforce
> the patent it got in 1985, that was unknowingly infringed in 87 by
> Compuserve.

Is it not true that a holder of a patent has to defend it from infringement in
order for it to stay valid? So if they did not start enforcing until 95 it
should not be valid.

Andreas





