🚀 go-pugleaf

In article <1992Nov4.053842.8113@panix.com>, oppedahl@panix.com (Carl Oppedahl) writes:
> In <1992Nov3.092637.42@nsrvan.vanc.wa.us> sysevm@nsrvan.vanc.wa.us writes:
> 
>>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.
>>> 
>>	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.
> 
>  
> Regarding US Pat. No. 4,200,770, the Derwent database says this: 
> the patent issued April 29, 1980.
> It is owned by Stanford University.
.
.
.
>  
> The US patent should expire April 29, 1997.
> -------------------------------------------
> Regarding US Pat. No. 4218582, the Derwent database says this:
> the US patent issued August 19, 1980.
> Assignee: STANFORD UNIVERSITY
.
.
.
> The US patent is expected to expire August 19, 1997.
> -------------------------------------------
> Regarding US Pat. No. 4,405,829, the Derwent database says this:
> the US patent issued September 20, 1983.  
> It appears the application was first filed in the US on December 14, 1977.
> Assignee: MASSACHUSETTS INST TECH
> The US patent would be expected to expire September 20, 2000.
> 
> I fear this is more than anyone wanted to know.
> 
> 
> Carl Oppedahl AA2KW  (intellectual property lawyer)
> 30 Rockefeller Plaza
> New York, NY  10112-0228
> voice 212-408-2578     fax 212-765-2519


	Thanks again Carl.

	Looking into the FAQ on RSA by Paul Fahn of RSA Labs at question 2.22
'Is RSA patented' we see the patent numbers and the following:

"In North America, a license is needed to "make,use or sell" RSA. However,
PKP has a policy that anyone may use RSA non-commercially for personal,
academic or intellectual reason without a license;"

The FAQ goes on to define some examples. The personal use of RSA I have in mind
is to encrypt my incomming plaintext mail. I think that E-mail should have the
same protections as postal mail and RSA is the 'key' to keeping snoops out.

Regards, Ethan