RE: [Asrg] C/R patents

["Hallam-Baker, Phillip" <pbaker@verisign.com>]

I know of extensive prior art in this area.

> -----Original Message-----
> From: Yakov Shafranovich [mailto:research@solidmatrix.com]
> Sent: Sunday, May 11, 2003 4:28 PM
> To: asrg@ietf.org
> Subject: [Asrg] C/R patents
> 
> 
> I finally found the actual patents, they are discussed in this story:
> 
> http://www.siliconvalley.com/mld/siliconvalley/business/column
> ists/mike_langberg/5565050.htm
> 
> According to the story both patents are currently owned by 
> MailBlocks, Inc. 
> The patent numbers are US# 6,199,102, filed August 26, 1997 
> and issued 
> March 6, 2001; and US # 6,112,227, filed on  August 6, 1998 
> and issued 
> August 29, 2000. Both patents can be looked up at the website 
> of the US 
> Patents and Trademarks Office 
> (http://patft.uspto.gov/netahtml/srchnum.htm).
> 
> Abstract of patent #  6,199,102:
> 
> A method is provided for preventing the delivery of unwanted 
> electronic 
> mail messages to a destination client. An original electronic 
> mail message 
> is first received from a source client at a destination 
> server. Next, a 
> reply electronic mail message is sent from the destination 
> server to the 
> source client requesting the source client to complete a registration 
> process to register the source client's electronic mail 
> address with the 
> destination server. The original electronic mail message is 
> only sent from 
> the destination server to the destination client when the 
> source client 
> properly registers the source client's electronic mail address.
> 
> Abstract of patent # 6,112,227:
> 
> A method is provided for preventing the delivery of unwanted 
> electronic 
> mail messages to a destination client. An original electronic 
> mail message 
> is first received from a source client at a destination 
> server. Next, a 
> reply electronic mail message is sent from the destination 
> server to the 
> source client requesting the source client to complete a registration 
> process to register the source client's electronic mail 
> address with the 
> destination server. The original electronic mail message is 
> only sent from 
> the destination server to the destination client when the 
> source client 
> properly registers the source client's electronic mail address.
> 
> The second one seems to cover all C/R systems and that's what 
> MailBlocks 
> claims in the news article.
> 
> Yakov
> 
> 
> --------------------------------------------------------------
> -------------------------------------
> Yakov Shafranovich / <research@solidmatrix.com>
> SolidMatrix Research, a division of SolidMatrix Technologies, Inc.
> --------------------------------------------------------------
> -------------------------------------
> "One who watches the wind will never sow, and one who keeps 
> his eyes on
> the clouds will never reap" (Ecclesiastes 11:4)
> --------------------------------------------------------------
> -------------------------------------  
> 
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