US 6772227

Patent Overview — US6772227B2

Title: Communicating between address spaces

Patent number / application: US6772227B2; application US10/147,442.

Assignee: Original assignee IP Dynamics Inc. The source lists current assignee as Hanger Solutions LLC, but states that listed assignees may be inaccurate and that Google has not performed an analysis or warranty as to the list.

Key dates (per source): Priority date 1998-01-29; filing date 2002-05-16; publication of US20020184390A1 on 2002-12-05; granted/publication of US6772227B2 on 2004-08-03; anticipated expiration 2018-01-29. Legal status: Expired – Lifetime.

Inventor: Hasan S. Alkhatib.

Purpose: The definitions section states the invention "is directed to a system for using Internet domain names to route data sent to a destination on a network." The excerpt frames this against address exhaustion in Internet Protocol, the class-based address structure (Class A/B/C), CIDR, and the limitations of Network Address Translation (NAT). It explains NAT's use of global versus local (private) addresses and a gateway that substitutes a global address for the source machine's local address and maintains a translation table; inbound packets pass only when a validating connection exists. The excerpt identifies one problem: NAT "will not work if the communication is initiated by a host outside of the private network and is directed to a host with a local address on the private network."

Plain-language scope: On the supplied text, the patent concerns routing data to a destination on a network using Internet domain names rather than relying solely on numerical IP addresses, in a context where private/local addresses are not directly usable on the Internet and inbound-initiated communication is problematic under NAT. Classifications include H04L12/66 (gateways) and H04L61/4511 (DNS-based name-to-address mapping).

What the excerpt does not establish: No claims are reproduced, so the precise claimed scope and its limitations cannot be described. The detailed description, embodiments, and any prior-art references are absent. The definitions mention CIDR, IPv6/IPng, and TCP/IP but do not fully explain them. Nothing here establishes validity, infringement, or the accuracy of listed assignees or litigation data.

Source: https://patents.google.com/patent/[US6772227](/patent/US6772227)/en