The owner of a national auto glass company in Oakland has been sentenced to more than three years in federal prison for overcharging insurance firms by installing cheaper windshields than his employees claimed on repair invoices, authorities said Wednesday.

Mehrdad "Tony" Hakimian, 48, of Mill Valley, the owner of Glass Emporium of Marin Inc., must spend 42 months behind bars and pay a $150,000 fine, U.S. District Judge D. Lowell Jensen said Friday at a hearing in Oakland.