Re: When does PKP's RSA patent expire?

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Article #351

#351

From: sysevm
Date: Tue, 03 Nov 1992 17:26

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In article <1992Nov3.043722.9603@panix.com>, oppedahl@panix.com (Carl Oppedahl) writes:
> In <Bx1o2L.AMz@access.digex.com> jthomas@access.digex.com (Joe Thomas) writes:
> 
>>   In all the posts I've read about PKP's patent claims over RSA public
>>key encryption, I have never seen anyone mention when the patent is due 
>>to expire.  I was under the impression that U.S. patent protection is only
.
.
.
>>somebody checks when it was filed?
> 
> If somebody will post the patent number I would be willing to check
> and see when it expires.
> 
> 
> Carl Oppedahl AA2KW  (intellectual property lawyer)
> 30 Rockefeller Plaza
> New York, NY  10112-0228
> voice 212-408-2578     fax 212-765-2519

	Thanks Carl, Try US Patent 4,200,770 4/29/80 by Hellman, Diffie, Merkle
and 4,218,582 8/19/80 by Hellman and Merkle.

regards, Ethan

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Message-ID: <1992Nov3.092637.42@nsrvan.vanc.wa.us>

Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!clark!nsrvan.vanc.wa.us!sysevm

References: <Bx1o2L.AMz@access.digex.com> <1992Nov3.043722.9603@panix.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!clark!nsrvan.vanc.wa.us!sysevm
From: sysevm@nsrvan.vanc.wa.us
Newsgroups: sci.crypt
Subject: Re: When does PKP's RSA patent expire?
Message-ID: <1992Nov3.092637.42@nsrvan.vanc.wa.us>
Date: 3 Nov 92 17:26:37 GMT
Article-I.D.: nsrvan.1992Nov3.092637.42
References: <Bx1o2L.AMz@access.digex.com> <1992Nov3.043722.9603@panix.com>
Organization: National Systems & Research, Vancouver WA
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