Case Details
- Citation: [2016] SGHC 280
- Case Title: Towa Corp v ASM Technology Singapore Pte Ltd and another
- Court: High Court of the Republic of Singapore
- Decision Date: 22 December 2016
- Judge: Lee Seiu Kin J
- Coram: Lee Seiu Kin J
- Case Number: Suit No 359 of 2013
- Plaintiff/Applicant: Towa Corporation
- Defendants/Respondents: ASM Technology Singapore Pte Ltd; ASM Pacific Technology Limited
- Parties’ Roles: Plaintiff was registered proprietor of Singapore Patent No 49740; defendants were alleged infringers and counterclaimed for groundless threats
- Legal Areas: Patents and inventions — Defence; Patents and inventions — Groundless threat; Patents and inventions — Infringement
- Key Statutes Referenced: Patents Act (Cap 221, 2005 Rev Ed); Limitation Act (Cap 163, 1996 Rev Ed)
- Other Materials Referenced: CIPA Guide to the Patents Act (earlier edition relied upon by defendants); CIPA Guide to the Patents Act
- Appeal Note: Appeal to this decision in Civil Appeal No 9 of 2017 dismissed by the Court of Appeal on 5 January 2018 (see [2018] SGCA 1)
- Judgment Length: 39 pages, 21,290 words
- Counsel: Low Chai Chong, Long Ai Ming, Foo Maw Jiun and Ng Chong Yuan (Dentons Rodyk & Davidson LLP) for the plaintiff; Lim Ying Sin Daniel (Joyce A. Tan & Partners LLC) for the defendants
- Patent in Suit: Singapore Patent No 49740 (“the Patent”)
- Patent Expiry: Expired sometime in 2014 (exact date disputed)
- Claims in Issue: Claims 1, 2, 4 and 5 (with Claim 2 dependent on Claim 1; Claim 5 dependent on Claim 4)
- Trial Structure: Suit bifurcated; trial proceeded on liability
- Infringing Product Alleged: IDEALmold machine
Summary
Towa Corp v ASM Technology Singapore Pte Ltd and another [2016] SGHC 280 concerned a patent infringement suit brought by the Japanese patent proprietor, Towa Corporation, against ASM Technology Singapore Pte Ltd and its parent, ASM Pacific Technology Limited. The plaintiff alleged that the defendants’ IDEALmold machine infringed Singapore Patent No 49740, which related to moulding resin to seal electronic parts. The defendants resisted the claim on multiple grounds, including invalidity (lack of novelty, inventive step, and sufficiency), non-infringement, and various defences. They also counterclaimed for groundless threats of infringement proceedings under s 77 of the Patents Act.
The High Court (Lee Seiu Kin J) approached the dispute through the orthodox patent framework: first, construing the relevant patent claims (particularly Claim 4, which was treated as the focal point because the process claim mirrored the operation of the product claim); second, assessing validity; third, determining prima facie infringement; and fourth, considering whether any defences were available. The court also addressed the counterclaim for groundless threats if the patent was not valid and/or infringement was not established.
Although the provided extract is truncated, the judgment’s structure and early holdings show that the court adopted a purposive yet claim-led approach to construction, anchored in the Court of Appeal’s guidance that claims are the principal determinant and should not be expanded by importing gloss from the description. The decision ultimately formed the basis for an appeal dismissed by the Court of Appeal in [2018] SGCA 1, underscoring its significance in Singapore patent litigation on claim construction and the interaction between infringement, validity, and groundless threats.
What Were the Facts of This Case?
The plaintiff, Towa Corporation, is incorporated in Japan and is the registered proprietor of Singapore Patent No 49740. The defendants comprise ASM Technology Singapore Pte Ltd, a Singapore-incorporated wholly owned subsidiary of ASM Pacific Technology Limited, which is incorporated in the Cayman Islands but has its registered address in Hong Kong. The patent in suit expired sometime in 2014, though the parties differed on the precise expiry date. The expiry mattered for remedies: the plaintiff initially sought an injunction but conceded in closing submissions that an injunction was inappropriate given the patent’s expiry.
The underlying technology concerned moulding machines used to encapsulate electronic circuitry with thermo-setting resin. The moulding process involves softening resin with heat and injecting it into a mould under high pressure so that, upon curing (usually induced by heat), the resin forms an infusible and insoluble polymer network that seals and protects the electronic components. The judgment provided historical context: in the 1970s, moulding required substantial manual input, including manual placement of resin tablets and lead frames into the moulding machine, and manual removal of sealed lead frames after curing. In the early 1990s, fully automated moulding machines emerged, automating loading and unloading as well as the pressing mechanism.
In the pleaded case, Towa alleged infringement by reference to the defendants’ IDEALmold machine. The plaintiff’s infringement case was framed across both process and product claims. Claims 1 and 2 were process claims; Claims 4 and 5 were product claims. The plaintiff alleged that ASM Technology Singapore offered for use in Singapore the IDEALmold machine infringing Claims 1 and 2, and that both defendants made, kept, offered to dispose of, and disposed of the IDEALmold machine in Singapore infringing Claims 4 and 5. The plaintiff further alleged joint infringement “pursuant to a common design” for the relevant acts.
The defendants’ response was multi-pronged. They denied infringement and asserted that the patent was invalid for lack of novelty, inventive step, and sufficiency. They argued that the IDEALmold machine merely embodied prior art teaching available before the patent’s priority date, without substantial patentable variation. They also challenged whether the claims covered the IDEALmold machine and whether the defendants used or offered use of the claimed process in Singapore. Additional defences included arguments about knowledge and obviousness, the role of the second defendant (described as an investment holding company not involved in manufacturing or sales), the absence of a common design, and limitation-related arguments based on alleged awareness of the IDEALmold machine since 1999/2000, invoking s 6 of the Limitation Act and defences such as estoppel, delay, laches, and acquiescence.
What Were the Key Legal Issues?
The High Court identified five broad issues for determination. First, it had to construe the patent claims properly, in particular Claim 4. Claim construction was central because infringement and validity both depend on the meaning of the claims. Second, it had to decide whether the patent—again focusing on Claim 4—was valid, including whether it satisfied requirements such as novelty, inventive step, and sufficiency.
Third, if the patent was valid, the court had to determine whether the defendants were prima facie liable for infringing the patent. This required an assessment of whether the IDEALmold machine (and the defendants’ acts in Singapore) fell within the scope of the asserted claims. Fourth, if prima facie infringement was established, the court had to consider whether any defences were available to the defendants. These included statutory defences under the Patents Act and other arguments raised in the pleaded case.
Fifth, if the patent was not valid and/or the defendants were not liable for infringement, the court had to consider whether the plaintiff was liable for making groundless threats of infringement proceedings under s 77 of the Patents Act. This issue required the court to examine the legal consequences of the plaintiff’s pre-litigation conduct and whether the threats were unjustifiable in light of the eventual outcome.
How Did the Court Analyse the Issues?
The court began with claim construction. It relied on s 113(1) of the Patents Act, which provides that an invention specified in a granted patent is taken to be that specified in the claims, interpreted by the description and drawings contained in the specification unless the context requires otherwise. The court then drew on Court of Appeal authority, particularly First Currency Choice Pte Ltd v Main-Line Corporate Holdings Ltd and another appeal [2008] 1 SLR(R) 335. In First Currency Choice, the Court of Appeal emphasised that the claims are the principal determinant, while the description and other parts may assist construction. Importantly, the Court of Appeal cautioned against “put[ting] a gloss on or expand[ing] the claims” by relying on statements in the specification where the claims have a plain meaning.
Consistent with that guidance, the High Court adopted a purposive approach to construction. The purposive approach, endorsed in cases such as Bean Innovations Pte Ltd and another v Flexon (Pte) Ltd [2001] 2 SLR(R) 116 and Catnic Components Limited and another v Hill & Smith Limited [1982] RPC 183, seeks to interpret patent claims in a manner that reflects the invention’s purpose rather than applying a purely literal, overly technical reading. However, the court also recognised the limits of purposive construction: it may inform how the words are understood, but it must not rewrite the claims or incorporate extraneous limitations from the description.
In practical terms, the court treated Claim 4 as the key claim for analysis. Claims 1 and 2 were process claims, while Claims 4 and 5 were product claims. Claim 2 depended on Claim 1, and Claim 5 depended on Claim 4. The court noted that Claim 1 was similar to Claim 4 in that Claim 1 taught the process whereby the moulding machine taught in Claim 4 is operated. This meant that construing Claim 4 would likely determine the scope of the corresponding process claim. The disputed portion of Claim 4 concerned an apparatus for moulding resin to seal electronic parts, including “additional molding units (5a, 5b, 5c) being rendered detachably mountable with respect to already provided said molding unit (5), thereby freely increasing/decreasing the number of said molding units.”
Although the extract does not include the later sections of the judgment, the court’s stated issue list indicates that after construction it would proceed to validity. The defendants’ invalidity case focused on novelty, inventive step, and sufficiency. In patent litigation, these grounds typically require a comparison between the claimed invention and the prior art, an assessment of whether the differences are substantial and would have been obvious to a person skilled in the art, and an evaluation of whether the specification enables the invention across the full scope of the claims. The court would also have to consider whether the IDEALmold machine fell within the claim scope as properly construed, and whether the defendants’ acts in Singapore—making, keeping, offering for use, offering to dispose of, and disposing—were the relevant infringing acts under the Patents Act.
The defendants’ infringement defences also raised issues of knowledge and obviousness. While direct infringement does not always require knowledge, certain forms of liability or related defences may engage the defendant’s state of mind depending on the statutory scheme and the pleaded case. The defendants also argued that the second defendant was merely an investment holding company and not involved in manufacturing or sales operations, which would affect whether it could be liable for the relevant acts. Further, the defendants denied a “common design,” which was relevant to the plaintiff’s allegation of joint infringement.
Finally, the court would have addressed the groundless threats counterclaim under s 77 of the Patents Act. The legal logic is that a patentee who threatens infringement proceedings may be liable if the threats are unjustifiable, typically because the threatened claim is not valid and/or not infringed. The court’s approach would therefore depend on its findings on validity and infringement. The bifurcation of the trial on liability suggests that the court first determined whether infringement and validity were established, and only then would damages for threats (if any) be assessed.
What Was the Outcome?
The extract provided does not include the court’s final orders. However, the LawNet editorial note states that the appeal to this decision in Civil Appeal No 9 of 2017 was dismissed by the Court of Appeal on 5 January 2018 (see [2018] SGCA 1). That appellate outcome indicates that the High Court’s determinations—whether on claim construction, validity, infringement, and/or the groundless threats counterclaim—were upheld.
In practical terms for litigants, the decision’s significance lies in its confirmation of the claim-led, purposive approach to construction in Singapore patent law, and in its structured treatment of the interlinked questions of validity, infringement, defences, and groundless threats. Even where a patent has expired, the court’s analysis remains relevant for past infringement liability and for assessing whether threats were justified at the time they were made.
Why Does This Case Matter?
Towa Corp v ASM Technology Singapore Pte Ltd and another is important for practitioners because it illustrates how Singapore courts approach patent claim construction in a disciplined manner. The judgment’s reliance on First Currency Choice and the insistence that claims are the principal determinant—without expanding them by importing gloss from the description—provides a clear framework for litigators drafting and construing claims. The purposive element ensures that claims are interpreted in a way that reflects the invention’s purpose, but the court’s caution against rewriting claims is equally critical.
For infringement analysis, the case demonstrates the practical value of identifying the “focal” claim. Here, the court treated Claim 4 as central because the process claim (Claim 1) was closely tied to the operation of the product claim. This approach can streamline litigation by focusing expert evidence and legal argument on the claim most likely to determine the scope of the others.
For groundless threats, the case underscores the conditional nature of liability under s 77: the justification for threats depends on the eventual legal assessment of validity and infringement. Practitioners should therefore treat pre-litigation threat letters as legally risky where the patent’s validity or infringement prospects are uncertain. The decision also highlights that even if injunctive relief is no longer available due to expiry, damages and other consequences may still be pursued, and the court will still engage in a full liability analysis.
Legislation Referenced
- Patents Act (Cap 221, 2005 Rev Ed), including:
- s 77 (groundless threats of infringement proceedings)
- s 113(1) (construction of claims in a granted patent)
- ss 69(1) and 70 (as referenced in the pleaded case)
- Limitation Act (Cap 163, 1996 Rev Ed), including:
- s 6 (limitation-related defence; as pleaded by defendants)
Cases Cited
- Towa Corp v ASM Technology Singapore Pte Ltd and another [2016] SGHC 280
- First Currency Choice Pte Ltd v Main-Line Corporate Holdings Ltd and another appeal [2008] 1 SLR(R) 335
- Bean Innovations Pte Ltd and another v Flexon (Pte) Ltd [2001] 2 SLR(R) 116
- Catnic Components Limited and another v Hill & Smith Limited [1982] RPC 183
- [2018] SGCA 1 (Court of Appeal dismissal of the appeal from [2016] SGHC 280)
Source Documents
This article analyses [2016] SGHC 280 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.