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Tsubakimoto Seiko Co. Ltd. v. THK K.K.

Supreme Court of Japan
Case No. 1994 (o) 1083


Facts

Plaintiff sued the defendant for infringing a Japanese patent claiming a ball spline shaft bearing. The Tokyo High Court held that the accused device met nearly all of the claim limitations except that some minor structural differences were present in the accused device. The High Court further held that the accused device was substantially the same as the claimed device, solved the same problem and achieved the same result.

Rule of Law

Issue

Holding and Reasoning (Judge not provided)

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