Crown Office in Chancery in the context of "Letters patent (United Kingdom)"

Letters patent (always in the plural; abbreviated to LsP by the Crown Office), in the United Kingdom, are legal instruments generally issued by the monarch granting an office, right, title (in the peerage and baronetage), or status to a person (and sometimes in regards to corporations and cities). Letters patent have also been used for the creation of corporations or offices, for granting city status, for granting coat of arms, and for granting royal assent.

Patents are prepared by the Crown Office; the name of the Clerk of the Crown in Chancery is subscribed/printed at the end of all documents as a way of authentication of their having passed through the Crown Office.