Smith Kline Beckman Corporation vs. Court of Appeals

A charge of patent infringement under the doctrine of equivalents requires satisfaction of the function-means-and-result test, wherein the patentee must show that the allegedly infringing device performs substantially the same function in substantially the same way to achieve substantially the same result.

Smith Kline Beckman Corporation, a Pennsylvania corporation licensed to do business in the Philippines, was issued Letters Patent No. 14561 for the compound methyl 5 propylthio-2-benzimidazole carbamate, an anthelmintic agent for animals. Tryco Pharma Corporation, a domestic corporation, manufactured and sold Impregon, a veterinary drug containing Albendazole, also an anthelmintic agent.

• Patent Issuance: Petitioner filed an application for patent over "Methods and Compositions for Producing Biphasic Parasiticide Activity Using Methyl 5 Propylthio-2-Benzimidazole Carbamate" on October 8, 1976. Letters Patent No. 14561 was issued on September 24, 1981 for a 17-year term, covering the compound, its anthelmintic but nontoxic property, and methods or compositions utilizing it against parasites in animals.
• Alleged Infringement: Respondent manufactured and sold Impregon, a veterinary drug containing Albendazole, which is effective against gastrointestinal roundworms, lungworms, tapeworms, and fluke infestation in animals. Petitioner sued for infringement of claims 2, 3, 4, 7, 8, and 9 of the patent and unfair competition, securing a temporary restraining order and a writ of preliminary injunction against respondent.
• Lower Court Findings: The RTC dismissed the complaint, declared the patent null and void for violating Sections 7, 9, and 15 of the Patent Law, and awarded actual damages and attorney's fees to respondent. The CA affirmed the dismissal of the infringement charge, finding Albendazole different from the patented compound based on the existence of a separate U.S. patent for Albendazole. However, the CA reversed the RTC on the patent's validity, sustaining it as a valid divisional application filed within the one-year rule under Section 15 of the Patent Law.

• Doctrine of Equivalents: Petitioner argued that Albendazole is substantially the same as the patented compound because both combat worm infestations in animals, performing the same function in the same way to achieve the same result. The Court should look beyond the literal wordings of the patent, which omit the word Albendazole.
• Divisional Application: Petitioner maintained that because the patent application was a divisional application of a prior U.S. application that included Albendazole, both compounds are mutually dependent and produce a single result, making Albendazole part of the patent.
• Damages: Petitioner assailed the award of actual damages as speculative and conjectural, and the award of attorney's fees as not falling under any of the exceptions provided by law.

• Different Compounds: Respondent countered that Albendazole and the patented compound have different chemical and physical properties. The existence of a separate U.S. patent for Albendazole indicates that it is distinct from the compound in Letters Patent No. 14561.
• Divisional Application Definition: Respondent argued that by definition of a divisional application, the patented compound is just one of several independent inventions alongside Albendazole under petitioner's original patent application, negating equivalence.

• Patent Infringement: Whether Albendazole is included in petitioner's Letters Patent No. 14561, making respondent liable for patent infringement under the doctrine of equivalents.
• Damages: Whether the award of actual damages and attorney's fees to respondent is proper.

• Patent Infringement: No infringement occurred. The doctrine of equivalents requires satisfaction of the function-means-and-result test. Petitioner only proved identity of result—both compounds are anthelmintic—but failed to prove identity of means, presenting no evidence on whether Albendazole operates in substantially the same way as the patented compound. Petitioner's witness was not qualified as an expert on chemical compounds. Furthermore, the divisional application concept proves the compounds are distinct; otherwise, a single patent would have been issued for both.
• Damages: The award of actual damages was deleted because respondent's evidence consisted merely of the testimonies of its officers, which is not competent proof or best evidence; documentary evidence is required to substantiate a claim for actual damages with a reasonable degree of certainty. Attorney's fees were deleted because there was no evidence of bad faith or malice on the part of the petitioner in filing the suit. However, temperate damages of ₱20,000.00 were awarded because respondent suffered some pecuniary loss the amount of which could not be proven with certainty.

• Doctrine of Equivalents — Provides that an infringement takes place when a device appropriates a prior invention by incorporating its innovative concept and, although with some modification and change, performs substantially the same function in substantially the same way to achieve substantially the same result. The patentee bears the burden to show that all three components of the equivalency test are met.
• Divisional Application — Comes into play when two or more inventions are claimed in a single application but are of such a nature that a single patent may not be issued for them. The applicant is required to divide the claims, and those inventions not elected may be made the subject of separate applications. This signifies that the inventions are distinct from one another.
• Proof of Actual Damages — Requires competent proof and the best evidence obtainable to substantiate the claim with a reasonable degree of certainty. Mere testimonial evidence of corporate officers, without documentary evidence, is insufficient to prove lost profits.
• Award of Attorney's Fees — May not be awarded where no sufficient showing of bad faith could be reflected in a party's persistence in a case other than an erroneous conviction of the righteousness of his cause.
• Temperate or Moderate Damages — Awarded when the court is convinced that there has been such a loss of some pecuniary value, but the amount cannot, from the nature of the case, be proved with certainty.

• "identity of result does not amount to infringement of patent unless Albendazole operates in substantially the same way or by substantially the same means as the patented compound, even though it performs the same function and achieves the same result."
• "the principle or mode of operation must be the same or substantially the same."

• Godines v. Court of Appeals, 226 SCRA 338 [1993] — Followed for the definition of the doctrine of equivalents.
• Malta v. Schulmerich Carillons, Inc., 13 U.S.P.Q. 2d 1900 [1989] — Followed for the rule that the patentee bears the burden to show that all three components of the equivalency test are met.
• Integrated Packaging Corporation v. Court of Appeals, 333 SCRA 170 [2000] — Followed for the rule that actual damages must be proven with a reasonable degree of certainty based on competent proof.
• Producers Bank of the Philippines v. Court of Appeals, 365 SCRA 326 [2001] — Followed for the requirement of documentary evidence to substantiate a claim for actual damages.
• ABS-CBN Broadcasting Corporation v. Court of Appeals, 301 SCRA 572 [1999] — Followed for the rule that attorney's fees may not be awarded absent a showing of bad faith.

• Article 189, Paragraph 1, Revised Penal Code; Section 29, Republic Act No. 166 — Unfair competition provisions cited in the complaint but effectively mooted by the finding of non-infringement.
• Sections 7, 9, 15, 17, and 46, Republic Act No. 165 (The Patent Law) — Sections 15 and 17 regarding the one-year rule and divisional applications were applied to sustain the validity of the patent against the lower court's nullification.
• Article 2208(2), Civil Code — Cited as basis for attorney's fees when a party is forced to litigate, but application was rejected due to absence of bad faith.
• Article 2224, Civil Code — Applied to award temperate or moderate damages when pecuniary loss is certain but the amount cannot be proved with certainty.

Puno (Chairman), Panganiban, Sandoval-Gutierrez, and Corona, JJ.