| Contracting Party | Treaty | Signature | Instrument | In Force | Details |
|---|
| Lesotho | Berne Convention | | Accession: June 27, 1989 | September 28, 1989 | Details |
| Lesotho | Madrid Agreement (Marks) | | Accession: November 12, 1998 | February 12, 1999 | Details |
| Lesotho | Madrid Protocol | | Accession: November 12, 1998 | February 12, 1999 | |
| Lesotho | Paris Convention | | Accession: June 27, 1989 | September 28, 1989 | Details |
| Lesotho | Patent Cooperation Treaty | | Accession: July 21, 1995 | October 21, 1995 | |
| Lesotho | Rome Convention | | Accession: October 26, 1989 | January 26, 1990 | Details |
| Lesotho | WIPO Convention | | Accession: August 18, 1986 | November 18, 1986 | |
