San Luis Obispo County’s second-largest law firm is changing names as one of its partners departs.

On Feb. 1, Sinsheimer Juhnke Lebens & McIvor will become Sinsheimer Juhnke McIvor & Stroh. Before the change, the firm ranked ninth-largest in the Tri-Counties with 12 attorneys and the second-largest in San Luis Obispo County. Its website now lists six attorneys and it’s unclear where it will rank.

Founded in 1978, the firm was one of the first business law firms to offer individual attorneys focused on specific areas of business law. The new addition to the firm’s name is Herb Stroh, whose practice concentrates in the areas of estate planning, trust, probate conservatorship and trust litigation.  He joined the firm in 2005, and became a principal in 2007, according to a release.

Tom Lebens, an intellectual property attorney who is also an electrical engineer, appears to have left the firm. Lebens, who had long held titles with both Sinsheimer Juhnke and the Chicago-based intellectual property firm Fitch, Even Tabin and Flannery, is now the managing partner of West Coast operations for the Chicago firm, according to his website. He could not be immediately reached for comment.