A lawyer should identify his location of practice under his own name or the names of the partners or some of them if there is a partnership. He should identify himself as a lawyer by the use of the words, "Law Office of", preceding his name or the use of the word "Lawyer" or the words "Attorney at Law" following his name, except that where he practices law as a "Professional Corporation", these words or the initials "P.C." should be added. Any further use of the words such as "Legal Clinic", "Law Building" or "Law Center" is surplusage, possibly misleading and deceptive, and is therefore prohibited.