Patent Infringement Litigation Procedure

1. Complaint and Answer

A patentee may initiate a lawsuit by filing a complaint that includes the parties’ information, prayer of remedy and grounds why the defendant is liable to the plaintiff. The plaintiff may seek a court granting an order of barring the opposing party’s infringing manufacturing, marketing and selling activities; the seizure or destruction of all finished or half-finished infringing products in the opposing party’s possession and compensation for damages.

The defendant may submit a written answer to deny or accept the complaint within 30 days of being served the complaint. Furthermore, the defendant may file a counterclaim. But, due to bifurcated system about independent invalidity action, the defendant may not file a counterclaim to invalidate the subject patent.

2. No Discovery like the US type is available.

3. Briefs and Evidence as Exhibits

After the court has served the answer to the plaintiff, the parties are required to exchange briefs and exhibits. Each party may object to those exhibits that are irrelevant or inappropriate. The plaintiff ordinarily files his briefs at first, and then the defendant files his briefs in turn. A court may allow the parties having another opportunity to exchange briefs before a preparatory oral hearing which is a kind of scheduling meeting. The court usually permits a 3~4 weeks period for each brief filing. The court usually rules on the admissibility of the objected exhibits in the oral hearing.

4. Oral Hearing

In the first oral hearing, the court will allow parties submitting their arguments and evidence and then will arrange the disputed facts and issues between parties. Through briefs, parties will provide the court with the nature of the controversy, evidence, legal contentions that the parties believe support their positions. The court will decide what issues are presented by both parties and how the case will proceed. It is likely for parties to have two or more oral hearings in patent infringement case.

5. Evidence

Korea does not have discovery procedures and jury trials. All lawsuits are tried by judges. Because judges are skilled in the rules of evidence, judges are usually lenient in allowing evidence to be introduced.

  A. Document Request

Each party can request the court to order the other party to submit relevant documents in issues. The party having the document must submit the document to the court. The court can enforce this order by monetary sanctions and evidentiary sanctions. Evidentiary sanctions include not allowing responding party’s submission of the evidence for his benefits, and more importantly may regard the requesting party’s assertion as true. The document request is not applicable to attorney client privilege documents, attorney work products and confidential information.

  B. Protective Order

In case a party insists the document is private, trade secret, or others, the court may order the party to submit the document and then examine without the other party’s participation. Hence it is not permitted for a respondent to refuse document submission for trade secret reasons. Only the party may seek court’s protective order on his information.

  C. Expert Opinion

The parties can retain experts to testify on their behalf. The party applying for expert opinion should submit expert candidates and manner of expert opinion, and further should pre-pay the cost. If the party applying for expert opinion wins the case, the prevailing party will recover the cost from the losing party. Patent cases need prudent expert opinions that usually need considerable time and cost.

  D. Court Inspection

Court inspection is adopted for judges to examine and analyze actual objects using the five senses of judges. The court inspection can be the most powerful means for proof if judges recognize the nature and contents of the subject evidence adequately. For example, judges may compare patent’s product with infringer’s product through watching experimentations or seeing or touching by themselves. Though ordinarily it is not easy for judges to comprehend the technical peculiarity through court inspection, the court often allows parties court inspection.

  E. Special Hearing for Technical Issues (Markman Hearing)

A court usually set an oral hearing for examining technical features. Both parties may present technical issues including background technology, claimed inventions, elements of the invention and comparison of elements between the patented invention and the accused product or process. Parties are permitted to use drawings, documents, power point presentations, models, real products, demonstrations, and others. It is one of the most important proceedings for parties to be able to have an influence on judge’s decision.

  F. Witness Examination

The party who calls a witness will conduct the first examination of the witness. The direct examination shall be done by using open-ended questions. For instance, any leading questions, which allow only for a “yes” or “no” answer, are not allowed. The opposing attorney has a chance to cross examine the witness and he is allowed to use leading questions: cross examination. But the cross examination shall be limited to the subject matter raised during the direct examination. When the opposing attorney has finished his cross examination, the attorney who did direct examination has an opportunity to conduct redirect examination. The attorney again cannot use leading questions.

Parties may submit an affidavit as documentary evidence for direct examination of a witness. In the oral hearing, only crucial points of the affidavit are examined and other details can be omitted in that direct examination. Accordingly, sufficient time is allotted for cross-examination. When a witness is hostile and is not under the influence of the requesting party, the party may file a motion that the witness must be summoned and when the motion is accepted the party must submit main contents for direct examination in advance.