PersonalWeb Technologies LLC v. EMC Corporation

Background

PersonalWeb Technologies LLC alleged that defendants infringed claims from three patents: U.S. Patent Nos. 6,928,310, 6,415,280, and 7,949,662. The patents, called the “True Name” patents by PersonalWeb, concern content-based identifiers. A hash function generates an identifier from the contents of a file or other data item, allowing a computer system to identify data independently of a user-selected file name or location.

The asserted claims addressed several data-management functions: controlling access to data based on content-based identifiers; retrieving and delivering data across a network of servers; and identifying duplicate data so that one copy could be deleted. The defendants argued that these claims were invalid under 35 U.S.C. § 101 because they covered abstract ideas rather than patent-eligible subject matter. PersonalWeb argued that the patents described a specific improvement in data management and were eligible for patent protection.

Procedural Issues

The defendants filed a motion for judgment on the pleadings under Federal Rule of Civil Procedure 12(c). The court described that motion as a way to challenge the sufficiency of the pleadings after the answer has been filed. PersonalWeb asked the court to convert the motion into a summary-judgment motion so it could consider a declaration from Dr. Samuel Russ. The defendants opposed conversion.

The court declined to convert the motion. It reasoned that only the nonmoving party had submitted evidence not subject to judicial notice and that the defendants had not received notice that the motion would be converted. The court therefore denied PersonalWeb’s request for conversion and did not use Dr. Russ’s declaration. The court also found the motion timely.

Patent-Eligibility Framework

Section 101 allows patents for new and useful processes, machines, manufactures, compositions of matter, and improvements of those things. It also contains judicial exceptions for laws of nature, natural phenomena, and abstract ideas. Under the two-step framework established by the Supreme Court, a court first asks whether the claims are directed to an abstract idea. If they are, the court then asks whether the claim elements, individually or in combination, contain an “inventive concept” that transforms the abstract idea into a patent-eligible application.

Step One: Abstract Idea

The court characterized the patents as covering:

The court held that all three patents were directed to an abstract three-step process: generating or using a content-based identifier produced by a hash or message-digest function, comparing that identifier with another identifier or request, and then providing access to, denying access to, or deleting data.

The court rejected PersonalWeb’s argument that the claims were non-abstract because the claimed system did not previously exist and because the patents allegedly improved the efficiency of locating, accessing, and deduplicating data. The court concluded that the claims addressed data management generally rather than a specific technological problem through a specific technological solution. It also stated that the patents did not claim a new way to generate the content-based identifier; instead, they applied a known hashing technique to data-management operations.

The court therefore held at step one that the asserted claims of all three patents were directed to abstract ideas.

Step Two: Inventive Concept

At step two, the court examined whether the claims contained something more than the abstract idea implemented with well-understood, routine, and conventional techniques. The court considered the use of hash identifiers, comparisons, access restrictions, deduplication, processors, memory, and computer networks.

The court held that these features did not supply an inventive concept. It described hash identifiers as generic and routine and treated comparing, restricting access to, and deduplicating data as well-known computer and data-management functions. The court also concluded that the claimed processors, servers, software, and networks were generic components that did not meaningfully limit the claims.

The court rejected PersonalWeb’s argument that the claims’ combination of elements was unconventional. It stated that the relevant question was whether features beyond the abstract idea were routine and conventional, not whether the claimed invention as a whole produced an unconventional result. The court concluded that the claims merely applied a well-known hashing concept to standard file-management functions.

Disposition

The court granted defendants’ motion for judgment on the pleadings and held the asserted claims of the ’310, ’280, and ’662 patents invalid for failure to satisfy 35 U.S.C. § 101. The court stated that patent eligibility was a legal issue and that amendment would be futile, so leave to amend would be denied; it also noted that PersonalWeb had not requested leave to amend. The clerk was directed to close the file, and judgment in favor of defendants was to follow. The opinion identifies the judge only as the court.