Canada: Bilski Applied: The Start Of The Ripple Effect

As reported in our April 2008 IP Update, the United States Court of Appeals for the Federal Circuit issued an en banc Order in the spring of 2008 that required the full Court to rehear the appeal of In Re Bernard L. Bilski and Rand A. Warsaw.

In U.S. Court of Appeals practice, an en banc rehearing is typically granted only where a case is considered unusually important. The U.S. Court of Appeals for the Federal Circuit had expressly raised the possibility of overruling its own prior decisions on business-method patents, namely State Street Bank & Trust Co. v. Signature Financial Group Inc., 149 F.3d 1368 (Fed. Cir. 1998) and AT&T Corp. v. Excel Communications, Inc., 172 F.3d 1352 (Fed. Cir. 1999).

Oral argument in the Bilski case was heard in May 2008, and the eagerly awaited decision was issued on October 30, 2008 [In re Bilski, 545 F. 3d 843 (Fed. Cir. 2008)(en banc)]. The Bilski decision carves back the definition of patentable subject matter in the United States, thereby limiting the types of inventions that may receive patent protection. The effects of the Bilski decision are just starting to be seen, and in December 2008, the Bilski decision was used to reject claims in a biotechnology patent. This article sets out a brief history of the rise of the business-method patent in the U.S. after the State Street decision, and then reviews the Bilski decision, and its potential effects on patenting strategies in the U.S. and Canada.

The State Street Case

The 1998 State Street decision, which was reconsidered by the United States Court of Appeals for the Federal Circuit, has been used since that date to support the patenting of claims in respect of the transformation of data by a machine; as well as business methods and software. The decision was controversial from the beginning, with critics pointing to the relative ease of obtaining software patents in the U.S. as compared to other jurisdictions, and the frequent issuance of U.S. patents for non-innovative ways to implement known methods using computers.

Prior to the State Street decision, the United States Patent and Trademark Office (USPTO) did not consider business methods to be patentable. State Street abolished the "business-method exception" to patentable subject matter, and held that business methods could be patentable if they could be applied to produce "a useful, concrete and tangible result" - that is, accomplish a practical application. The business method at issue in State Street was for a computer-based system of pooling mutual funds.

State Street opened the floodgates to business-method patent applications in the United States, resulting in a seven-fold increase in business-method patent application filings from 1998 to 2006. Numerous patents have been granted for business methods, many for internet-based methods ranging from's "one-click" on-line ordering process to's on-line reverse auction for airline tickets. The Bilski decision could affect the validity of scores of patents issued since State Street.

The Bilski Decision

In Bilski, the United States Court of Appeals for the Federal Circuit held that the test for patentable subject matter articulated in State Street was insufficient. It is now no longer enough for a claimed process to produce a "useful, concrete, and tangible result." Instead, the majority of the Court articulated a "machine-or-transformation test," which would restrict patenting to inventions that are either tied to a particular machine or apparatus, or that transform a particular article into a different state or thing. Furthermore, "the involvement of the machine or transformation in the claimed process must not merely be insignificant extra-solution activity." In other words, use of the machine must play a meaningful role in the claimed method.

The test leaves some areas of ambiguity. For example, the word "article" has not been defined, and there is no discussion of the level of transformation that might be considered sufficient to meet the test. Such issues were not required to be resolved in considering the invention at issue in Bilski, which was a "method for managing the consumption risk costs of a commodity." The patent application described the method of hedging risk as one whereby an intermediate commodity-provider bought a commodity at a fixed price and sold the commodity at another fixed price, thereby protecting the provider from major changes in the demand and price of the commodity.

In rejecting the application, the USPTO noted that the claimed invention was not restricted to performance by machines and/or did not contain any limitation to prevent it from covering a purely mental process by individuals. The question before the Court in Bilski was whether the Bilski application was attempting to patent a fundamental principle, such as an abstract idea, or a mental process, which are examples of subject matter that had always been considered to be unpatentable.

The Court found that the claimed process "encompasses the exchange of only options, which are simply legal rights to purchase some commodity at a given price in a given time period. The claim only refers to 'transactions' involving the exchange of these legal rights at a 'fixed rate corresponding to a risk position.'" The Court confirmed that a claimed process where every step may be performed entirely in the human mind is not patentable. Such an exchange of legal rights was held not to qualify as a transformation because the transformed result is neither a physical thing nor a depiction of one. The Court made it clear, however, that the transformation does not require any underlying physical object. For example, generating a particular visual depiction of a physical object on a display using raw data qualifies as a transformation.

The Court also noted that a process involving a "physical step" might still be unpatentable if it does not involve a particular machine or apparatus. The Court declined to comment on the USPTO's position that a general-purpose computer is not considered a "particular machine," because the claimed process in the Bilski application did not involve any machine, even a computer. Therefore, the Court left for another day the question of whether a process that involves a general computer would suffice.


The majority decision in Bilski claims a middle ground between the poles of the dissenting opinions. Judge Mayer, in one dissenting opinion, took a very narrow view of the definition of patentable subject matter, arguing that the majority should have gone further to overrule completely State Street Bank and AT&T v. Excel. According to Judge Mayer, affording patent protection to business methods lacks statutory support and hinders innovation.

Judge Rader and Judge Newman took a much broader approach in their respective dissenting opinions. Judge Rader argued that the majority's decision relies heavily on past Supreme Court judgments that are no longer appropriate in the context of today's technology. In his view, the Federal Circuit unnecessarily and erroneously expanded on the Supreme Court's long-established principle that laws of nature, natural phenomena, and abstract ideas are excluded from patent protection, and Judge Rader was also concerned that the promotion of innovation will be limited as a result.

Judge Newman argued that the majority opinion is contrary to the statute and precedent, and a negation of the constitutional mandate because it "excludes many of the kinds of inventions that apply today's electronic and photonic technologies, as well as other processes that handle data and information in novel ways" and that have been patent-eligible in the past.

Bilski Applied

On December 19, 2008, the United States Court of Appeals for the Federal Circuit mechanically applied the Bilski decision in Classen Immunotherapies, Inc. v. Biogen IDEC et al. (Fed. Cir. Dec. 19, 2008), which involved diagnostic claims in the field of life sciences. The claims at issue covered a "method of determining whether an immunization schedule affects the incidence or severity of a chronic immune-mediated disorder in a treatment group of mammals, relative to a control group of mammals" and a method of determining the optimal immunization schedule. The steps included immunizing mammals and comparing data between the two subject groups.

The district court ruled that claims to the relationship between the timing of the administration of vaccinations and the development of the disorder are unpatentable because they are claims encompassing a natural phenomenon. The appellate court affirmed this decision with a terse judgment, which consists (in its entirety) of the following:

In light of our decision in In re Bilski, 545 F.3d 843 (Fed. Cir. 2008) (en banc), we affirm the district court's grant of summary judgment that these claims are invalid under 35 U.S.C. §101. Dr. Classen's claims are neither "tied to a particular machine or apparatus" nor do they "transform a particular article into a different state or thing." Bilski, 545 F.3d at 954. Therefore we affirm.

The Court provided no additional reasoning or explanation of Bilski, for example, with respect to what "transformation" means. It may be possible that the claim would be patentable if the development of the disorder was visually depicted on a diagnostic computer or if the process was tied to an apparatus in some other way.

A similar issue arises in respect of the invention claimed in Prometheus v. Mayo, which deals with a correlation between the amount of drug metabolite in the body and optimal drug dosage. This invention was similarly held by the USPTO to be an unpatentable natural phenomenon, and the case is currently pending review by the Federal Circuit. It will be interesting to see whether the Federal Circuit applies Bilski in a similar way as in Classen.

What Next?

In light of Bilski, companies should review their entire U.S. patent portfolio for patents that may now be vulnerable to impeachment by competitors on the grounds that the patents encompass nonpatentable subject matter. Patents issued in the last two years may still be in the window of opportunity that would allow the filing of a reissue-patent application to include additional limitations required by the machine-or-transformation test.

The Bilski decision does not have a significant impact on the drafting of Canadian business method and software patents, because the law in Canada has always been more restrictive in this field than in the United States. Since the 1981 decision of Schlumberger Canada Ltd. v. Commissioner of Patents [(1981) 56 C.P.R. (2d) 204 (FCA)], software-related inventions have been patentable if the new software was coupled with computer hardware, even if the hardware component is nominal.

Prior to 2005, the Canadian Intellectual Property Office (CIPO) applied a fairly restrictive approach to the Schlumberger decision, holding that computer programs per se are not patentable in Canada, because they are considered to be a mere scientific principle or abstract theorem. However, Canadian patents have been granted for systems and devices that use software. In one case, the inclusion of a specific piece of conventional computer hardware, namely read-only memory (ROM), was sufficient to render the ROM that stored the novel software program patentable.

Since 2005, CIPO has loosened its interpretation of the Schlumberger decision. CIPO guidelines now state that for a software invention to be patentable, it must be "an act or series of acts performed by some physical agent upon some physical object and producing in such object some change either of character or condition" and "it must produce an essentially economic result in relation to trade, industry or commerce." The requirements of "physical agent" and "change" are aspects similar to the machine-or-transformation test now applied in the United States.

The Bilski case is widely expected to be appealed to the Supreme Court, which may, of course, alter or set aside the Court of Appeals decision. Therefore, this may not be the last we hear of Bilski.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

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