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Re: UUNET Network Encryption Patents

"Perry E. Metzger" <perry@piermont.com> Mon, 17 June 1996 23:00 UTC

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To: Jim Thompson <jim@smallworks.com>
Cc: ipsec@TIS.COM
Subject: Re: UUNET Network Encryption Patents
In-Reply-To: Your message of "Mon, 17 Jun 1996 17:52:58 CDT." <9606171752.ZM10066@butthead.smallworks.com>
Reply-To: perry@piermont.com
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Date: Mon, 17 Jun 1996 19:03:47 -0400
From: "Perry E. Metzger" <perry@piermont.com>
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"Jim Thompson" writes:
> > It doesn't matter, though. The patents are invalid on their face. None
> > of this is new technology -- this stuff is all very old. Prior art
> > fully invalidates a patent.
> 
> Perry, it just ain't true that 'prior art fully invalidates a patent'. (I've
> just had a discussion with that IP lawyer we have on-staff here.)
> 
> Prior art is a defense to litigation, its true, but it doesn't invalidate a
> patent.
> 
> The only way to invalidate a patent is to ask for re-examination

The distinction is unimportant for purposes of this discussion.

.pm

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