Prior art

As a senior technical patent analyst, I have examined the prior art references cited during the prosecution of U.S. Patent 6,108,329. Below is an analysis of each reference and its potential to anticipate the claims of the '329 patent under 35 U.S.C. § 102.

The analysis focuses on the independent claim, Claim 1, as the validity of dependent claim 2 relies upon it. For a reference to anticipate a claim, it must disclose, either expressly or inherently, every limitation of that claim.

Analysis of Cited Prior Art

Based on the file wrapper, the following references were cited by the USPTO examiner.

1. U.S. Patent 5,062,133A: Multi-function telephone call management system

• Publication Date: October 29, 1991
• Filing Date: July 7, 1989
• Brief Description: This patent describes a telephone call management system that can screen incoming calls based on a stored list of telephone numbers. It can automatically answer calls, play customized greetings based on the caller's identity (determined via Caller ID), and record messages. The system can connect to a telephone line and includes features for blocking or selectively accepting calls.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: The '133 patent discloses a system that connects to a telephone network, stores a list of callers in memory, compares incoming caller information (Caller ID) to this list, and takes action (connecting, disconnecting, playing a specific message) based on the comparison. This aligns with elements E(i), E(vi), and E(vii) of claim 1.
  • Elements Not Disclosed: The '133 patent operates entirely within the context of the conventional Public Switched Telephone Network (PSTN) using standard analog signaling and Caller ID. It does not disclose or suggest connecting to a packet-switched network like the internet, the use of a server with a database of IP addresses and PPP phone numbers, establishing a PPP connection, or distinguishing between an internet-based call and a standard telephone call. It also does not mention receiving or storing e-mail messages. Therefore, it fails to disclose key limitations of claim 1, including A, B, C, D, E(iii), E(iv), and E(viii).
  • Conclusion: The '133 patent does not anticipate claim 1.

2. U.S. Patent 5,341,411A: Caller ID blocking method and processing system

• Publication Date: August 23, 1994
• Filing Date: September 21, 1990
• Brief Description: This patent details a system for managing Caller ID information, specifically allowing a subscriber to block their number from being displayed on certain calls. It also describes screening incoming calls based on whether the Caller ID is present or blocked, allowing a user to reject anonymous calls.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: The '411 patent discloses comparing incoming call information against a set of rules (e.g., whether the call is from a blocked number). This relates to the concept of judging a caller found in element E(vi).
  • Elements Not Disclosed: Like the '133 patent, the '411 patent is confined to the PSTN. It does not teach the core concepts of the '329 patent's claim 1, such as the use of an internet network, a server database for PPP/IP information, establishing PPP connections, or handling internet-specific data like e-mail.
  • Conclusion: The '411 patent does not anticipate claim 1.

3. U.S. Patent 5,546,448A: Apparatus and method for a caller ID modem interface

• Publication Date: August 13, 1996
• Filing Date: November 10, 1994
• Brief Description: This patent discloses a modem capable of receiving and interpreting Caller ID information from a telephone line. The modem can pass this information to a connected computer, allowing software on the computer to use the caller's number for various functions, such as database lookups or call logging.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: The '448 patent discloses a modulator/demodulator circuit (modem) connected to a telephone line (related to E(ii)) that processes incoming call data (Caller ID).
  • Elements Not Disclosed: The system in the '448 patent uses the modem to receive Caller ID, not to establish an internet (PPP) connection for a voice call. It does not disclose a server that resolves a terminal's public phone number for a PPP connection, nor does it distinguish between an internet call and a standard PSTN call to route it differently. The fundamental architecture of an internet telephone system as claimed is absent.
  • Conclusion: The '448 patent does not anticipate claim 1.

4. U.S. Patent 5,675,507A: Message storage and delivery system

• Publication Date: October 7, 1997
• Filing Date: April 28, 1995
• Brief Description: This patent describes a unified messaging system where users can access different types of messages (voice, fax, email) from a single mailbox. The system can be accessed over a network. It focuses on the integration of various message formats and providing a unified interface for retrieval.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: The '507 patent discloses a system involving a server and a network that can store different message types, including email (E(viii)). This shows the convergence of telephony and data networks.
  • Elements Not Disclosed: The '507 patent is focused on message storage and retrieval, not the real-time setup of a voice call over the internet as described in claim 1. It does not disclose the critical steps of a server looking up a PPP-dialup number from a database to initiate a connection with a terminal that is currently offline from the internet. The screening of live calls based on an approved list is also not a central feature.
  • Conclusion: The '507 patent does not anticipate claim 1.

5. WO 1996/020553 A2: Unified messaging and long distance communication system

• Publication Date: July 4, 1996
• Priority Date: December 23, 1994
• Brief Description: This international application describes a system that integrates messaging (voice, email, fax) with a communication system that can route long-distance calls over a data network (like the internet) to save costs. It describes using the network to connect two PSTN-connected users.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: This reference discloses the use of a data network for voice calls, involving servers, and the integration of email. This touches on elements A, B, and E(viii).
  • Elements Not Disclosed: The key limitation of claim 1 is the specific mechanism for contacting a terminal that is not persistently connected to the internet. Claim 1 requires a server that stores a public phone number for a PPP connection, dials that number to bring the destination terminal online, and then establishes the internet call. The '553 application does not appear to disclose this specific "dial-out" initiation process based on a stored PPP number. Furthermore, the client-side screening against a user-designated list of approved callers is not described.
  • Conclusion: The '553 application does not anticipate claim 1.

6. WO 1996/038018 A1: Method and system for setting up a speech connection in different networks

• Publication Date: November 28, 1996
• Priority Date: May 24, 1995
• Brief Description: This application from Ericsson describes a method for setting up a voice call between a user on a data network (e.g., Internet) and a user on a traditional telephone network (PSTN/ISDN). It involves a gateway that translates between the packet-switched and circuit-switched networks.
• Potential Anticipation of Claim 1:
  • Elements Disclosed: This reference shows a system with a server/gateway connecting an internet network to a telephone network for voice calls, thus disclosing elements A and B.
  • Elements Not Disclosed: The focus of the '018 application is on interconnecting two different types of networks. It does not describe the specific scenario of two PPP-based terminals where one must be dialed up by the server using a stored telephone number. The claimed client-side apparatus with its specific features—distinguishing call types, screening against an approved caller list, and storing emails on unanswered calls—is not disclosed in this reference.
  • Conclusion: The '018 application does not anticipate claim 1.

Based on this analysis, none of the cited prior art references appear to anticipate claim 1 of US Patent 6,108,329. While the references collectively show a trend towards integrating voice and data networks, none of them disclose the complete combination of limitations recited in the claim, particularly the server-initiated PPP dial-up to an offline terminal combined with the specific call-screening and message-handling features of the destination telephone apparatus.