| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| ARGENTINE REPUBLIC | Signature | 18/10/1907 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRIA-HUNGARY | Signature | 18/10/1907 | |
| BELGIUM | Signature | 18/10/1907 | |
| BOLIVIA | Signature | 18/10/1907 | |
| BULGARIA | Signature | 18/10/1907 | |
| CHILE | Signature | 18/10/1907 | |
| COLOMBIA | Signature | 18/10/1907 | |
| CUBA | Signature | 18/10/1907 | |
| DENMARK | Signature | 18/10/1907 | |
| ECUADOR | Signature | 18/10/1907 | |
| FRANCE | Signature | 18/10/1907 | |
| GERMANY | Signature | 18/10/1907 | |
| GUATEMALA | Signature | 18/10/1907 | |
| HAYTI | Signature | 18/10/1907 | |
| ITALY | Signature | 18/10/1907 | |
| JAPAN | Signature | 18/10/1907 | |
| LITHUANIA | Def EIF | 11/11/2004 | 09/01/2005 |
| MADAGASCAR | Accession | 13/09/2009 | 06/12/2009 |
| MEXICO | Signature | 18/10/1907 | |
| NETHERLANDS THE | Signature | 18/10/1907 | |
| NETHERLANDS THE | Declaration | 18/10/2010 | |
| NICARAGUA | Accession | 09/09/1908 | |
| NORWAY | Signature | 18/10/1907 | |
| PANAMA | Signature | 18/10/1907 | |
| PANAMA | Provisional application | 11/09/1911 | |
| PARAGUAY | Signature | 18/10/1907 | |
| PERSIA | Signature | 18/10/1907 | |
| PERU | Signature | 18/10/1907 | |
| PORTUGAL | Signature | 18/10/1907 | |
| SALVADOR | Signature | 18/10/1907 | |
| SIAM | Signature | 18/10/1907 | |
| SPAIN | Signature | 18/10/1907 | |
| SWEDEN | Signature | 18/10/1907 | |
| SWITZERLAND | Signature | 18/10/1907 | |
| TOGO | Def EIF | 18/10/2004 | 17/12/2004 |
| TURKEY | Signature | 18/10/1907 | |
| UNITED KINGDOM | Signature | 18/10/1907 | |
| UNITED STATES OF AMERICA | Signature | 18/10/1907 | |
| URUGUAY | Signature | 18/10/1907 | |