Prior art — US Patent 5115326

Prior Art Analysis for U.S. Patent 5,115,326

Based on the patent documentation for US 5,115,326, the following U.S. Patents were cited as prior art by the applicant. This analysis assesses their relevance to the claims of the '326 patent.

1. U.S. Patent 4,893,330: "Facsimile Mail System"

Full Citation: U.S. Patent 4,893,330, issued to R. M. St-Amand, filed on July 29, 1988, and published on January 9, 1990.
Brief Description: This patent describes a system for sending facsimile messages to subscribers of an electronic mail (E-mail) system. A central "facsimile-mail processing center" receives a fax, digitizes it, and stores it in a database. The sender can then dial into the system and provide the recipient's E-mail address via DTMF (touch-tone) signals. The system retrieves the stored fax and transmits it to the specified E-mail address.
Potential Anticipation of Claims:
- Claim 1 & 9 (Routing fax to a network address): This patent is highly relevant. It discloses the core concept of a centralized system receiving a fax and routing it to a network (E-mail) destination. However, the method of specifying the destination address is critically different. The '330 patent uses DTMF tones entered during a phone call after the fax is sent, whereas the '326 patent specifies the address directly on the document itself using a bar code. Therefore, while it teaches the general system architecture, it does not anticipate the specific method of encoding the address on the message, which is a key limitation of claims 1 and 9 of the '326 patent.

2. U.S. Patent 4,754,426: "Apparatus for Transmission of Coded Information"

Full Citation: U.S. Patent 4,754,426, issued to B. T. H. Tashima et al., filed on December 23, 1985, and published on June 28, 1988.
Brief Description: This patent details a method for transmitting data that includes both image information (like a fax) and coded character data (like ASCII text) in a single transmission. It describes a system where a document can have marks or codes that are read by the transmitting terminal. This coded information can be used for various purposes, including addressing or providing commands.
Potential Anticipation of Claims:
- Claim 1, 7, & 9 (Encoding information on the document): This patent discloses the concept of placing machine-readable codes on a document that is being faxed to convey information beyond the image itself. This is a foundational concept for the '326 patent. However, the '426 patent appears to focus on the transmission protocol and the general use of coded data rather than the specific application of using a bar code on a cover sheet to automatically route the entire document image to a specific network e-mail address by a central server. It does not explicitly describe a "fax server" that intercepts the message, decodes the address, and forwards it on a LAN. The '326 patent's claims are specific to this server-based routing workflow.

3. U.S. Patent 4,654,724: "Automatic Facsimile Communication System"

Full Citation: U.S. Patent 4,654,724, issued to M. Kurihara, filed on May 24, 1984, and published on March 31, 1987.
Brief Description: This patent describes an automatic facsimile system where a transmitting machine can read destination information from a "request card" or "mark sheet." This sheet contains marks (like filled-in circles) that represent a pre-registered destination telephone number. The machine reads the card, looks up the corresponding full phone number from a memory, and automatically dials and sends the subsequent document pages.
Potential Anticipation of Claims:
- Claim 1, 7, & 9 (Automatic routing from document information): This reference teaches automatic transmission based on machine-readable information on a special sheet. This is conceptually similar to the '326 patent's use of a bar-coded cover page. However, the '724 patent is focused on automating the dialing of a destination fax machine's telephone number. It does not describe routing a fax image to an E-mail or other computer network address, which is the central innovation claimed in the '326 patent. The destination is another endpoint on the telephone network, not a node on a computer network.

4. U.S. Patent 4,837,834: "Facsimile Apparatus with Bar Code Reading Function"

Full Citation: U.S. Patent 4,837,834, issued to Y. O-Otake, filed on July 14, 1987, and published on June 6, 1989.
Brief Description: This patent discloses a facsimile machine that incorporates a bar code reader. The bar code reader can scan a bar code that contains a destination telephone number. This allows a user to initiate a fax transmission by simply scanning a bar code instead of manually dialing the number.
Potential Anticipation of Claims:
- Claim 1 & 9 (Using bar code for destination): This patent explicitly teaches using a bar code to encode a destination address for a fax. This is a significant element of the '326 patent. However, like the '724 patent, the destination encoded in the bar code is a telephone number for another fax machine. It does not anticipate the novel step of a fax server interpreting a bar code as a computer network (E-mail) address and routing the fax image over that network. The claimed method in '326 operates at a server gateway between the telephone network and a computer network, a different context than the point-to-point fax machine described here.
- Claim 5 (Orientation detection): This patent does not appear to describe or suggest using an asymmetrical bar code to detect document orientation. Its focus is on automating the dialing process.