A software inventor had his claims for misappropriation of confidential ideas and breach of fiduciary duty revived Tuesday against an early investor who allegedly provided the inventor’s trade secrets to the founders of Pinterest.

A unanimous ruling by the Appellate Division, First Department, said Justice Melvin Schweitzer, who sat in the Commercial Division, had erred in dismissing Theodore Schroeder’s claims against Brian Cohen, chairman of New York Angels, who was an investor in Schroeder’s early-stage companies.