Case Details
- Citation: [2007] SGHC 81
- Court: High Court of the Republic of Singapore
- Date: 2007-05-25
- Judges: Lai Siu Chiu J
- Plaintiff/Applicant: Seiko Epson Corp
- Defendant/Respondent: Sepoms Technology Pte Ltd and Another
- Legal Areas: Patents and Inventions — Infringement
- Statutes Referenced: Patents Act
- Cases Cited: [1996] SGHC 136, [2007] SGHC 81
- Judgment Length: 5 pages, 2,448 words
Summary
This case involves a dispute over patent infringement between printer manufacturer Seiko Epson Corp and ink cartridge producers Sepoms Technology Pte Ltd and Jal Technology (S) Pte Ltd. The High Court of Singapore had to determine the appropriate period for which the defendants should account for profits from their infringing activities, in light of their claim that they were unaware of the plaintiff's patent until being served with the lawsuit.
What Were the Facts of This Case?
Seiko Epson Corporation, the plaintiff, is a manufacturer of ink jet printers. The defendants, Sepoms Technology Pte Ltd and Jal Technology (S) Pte Ltd, manufacture and sell compatible and refillable ink cartridges that can be used with printers like those made by the plaintiff. Both the plaintiff and the defendants own patents related to ink cartridges.
In October 2005, the plaintiff sued the defendants for infringing its Singapore Patent No. SG46602. The defendants denied infringement, arguing that they were unaware of the plaintiff's patent and had no reasonable grounds to believe it existed prior to being served with the lawsuit.
In August 2006, the parties reached a consent judgment, where the court found the plaintiff's patent to be valid and infringed by the defendants. The defendants were ordered to stop selling the infringing ink cartridges and to account for their profits from the infringement.
In compliance with the consent judgment, the defendants filed accounts covering the period from the date of the writ (October 2005) to July 2006. However, the defendants' director Chou Khow Shing deposed that the defendants only became aware of the plaintiff's patent when they were served with the lawsuit in October 2005, and therefore should only be liable to account for profits from that date onwards.
What Were the Key Legal Issues?
The key legal issue was whether the defendants could limit their liability to account for profits to the period after they became aware of the plaintiff's patent, based on the defense of "innocent infringement" under Section 69(1) of the Patents Act.
The plaintiff argued that the defendants were estopped from raising this defense after the consent judgment, which had conclusively established the defendants' liability for infringement. The defendants contended that the issue of when they acquired knowledge of the patent was still relevant to determining the appropriate accounting period, and should be decided at the inquiry stage rather than at the interlocutory stage.
How Did the Court Analyse the Issues?
The court accepted the defendants' arguments. It held that Section 69(1) of the Patents Act limits a defendant's liability for damages or an account of profits if they prove they were unaware of the patent's existence and had no reasonable grounds to believe it existed.
The court noted that the consent judgment was similar to an interlocutory judgment, as it had only established the defendants' liability for infringement, while the issue of the appropriate accounting period remained to be determined. Just as in an assessment of damages after an interlocutory judgment, the court held that the question of when the defendants acquired knowledge of the patent should be decided at the inquiry stage, not at the interlocutory stage.
The court rejected the plaintiff's argument that the defendants were estopped from raising the innocent infringement defense by the consent judgment. It held that the consent judgment was final only on the issue of liability, and did not preclude the defendants from subsequently proving the timing of when they became aware of the patent.
What Was the Outcome?
The High Court dismissed the plaintiff's appeal and upheld the decision of the Assistant Registrar. The court ruled that the defendants were entitled to rely on the defense of innocent infringement under Section 69(1) of the Patents Act to limit their liability to account for profits to the period after they became aware of the plaintiff's patent.
The specific determination of when the defendants acquired the requisite knowledge was left to be decided at the inquiry stage, where evidence could be presented and witnesses could testify on this issue.
Why Does This Case Matter?
This case provides important guidance on the application of the "innocent infringement" defense under Singapore's Patents Act. It clarifies that even where a consent judgment has been reached establishing liability for patent infringement, the defendant may still be able to limit their accounting of profits by proving they were unaware of the patent's existence.
The decision reinforces that the timing of when an infringer became aware of the patent is a factual issue that should be determined at the inquiry stage, rather than being pre-empted at the interlocutory stage. This ensures the defendant has a full opportunity to present evidence and arguments on this point.
The case also highlights the distinction between the finality of a consent judgment on the issue of liability, versus the ongoing nature of the accounting process. Even where liability has been conclusively established, the court retains discretion to determine the appropriate scope and period of the accounting based on the specific circumstances.
Legislation Referenced
- Patents Act (Cap 221, 2005 Rev Ed)
Cases Cited
- [1996] SGHC 136
- [2007] SGHC 81
- [2005] 3 SLR 157
- [2001] 1 SLR 401
- [2005] 3 SLR 389
- [2007] 1 SLR 1021
- [1966] RPC 513
- [1975] RPC 307
Source Documents
This article analyses [2007] SGHC 81 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.