The appeal is dismissed.

The costs of appeal are assessed against the defendant.

The grounds of appeal are examined (to the extent of supplement in case of supplemental appellate briefs not timely filed).

1. As to the grounds of appeal Nos. 1 and 2, Article 136(1) and (3) of the former Patent Act (amended by Act No. 7871, Mar. 3, 2006; hereinafter the same) provides that a patentee may file a petition for correction of the specification or drawing to the extent that the claim is substantially expanded or modified.

Here, whether a claim is substantially extended or modified should be determined in preparation for the substantial contents of the claim identified by the entire specification and drawings, including not only the formal description of the claim itself, but also the detailed description of the invention.

In addition, even if based on the claim after the correction, there is no change in the purpose or effect of the invention, and reflects the contents indicated in the detailed description and drawings, and thus, if there is no possibility that the claim before the correction will cause unexpected damages to a third party, the request for correction does not constitute substantial expansion or alteration of the claim.

(대법원 2010. 4. 29. 선고 2008후1081 판결, 대법원 2014. 2. 13. 선고 2012후627 판결 등 참조). 원심은, 명칭을 ‘상승 폼웍의 분리가능한 상승 슈’로 하는 이 사건 특허발명(특허등록번호 제707547호)에 대하여, 정정 전 특허청구범위에 기재되어 있지 않았던 원심 판시 추가구성 1 [상승 레일(20)을 이동시키기 위한 상승 실린더(26)가 놓여지는 힌지 샤프트(30)] 및 추가구성 2 [슬라이딩 슈 부분(16)이 수평 배향된 스터브 샤프트(34)에 의하여 벽면 슈 부분(18)과 회전가능하게 결합]의 구성을 추가한 이 사건 정정은, 아래와 같은 이유로...