sentences:  Founded in 1976, the company was traded on the Tel Aviv Stock Exchange from 1991 until it was acquired, and was a constituent of its Tel-tech index.Headquartered in the Har Hotzvim industrial park in Jerusalem, Israel Ophir owns a complex that includes the group's main production plant.Ophir has additional production plants in North Andover, Massachusetts and Logan, Utah in the US and sales offices in the US, Japan and Europe.