| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| ARGENTINE REPUBLIC | Accession | 17/06/1907 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRIA-HUNGARY | Signature | 29/07/1899 | |
| AUSTRIA-HUNGARY | Ratification | 04/09/1900 | |
| BELGIUM | Signature | 29/07/1899 | |
| BELGIUM | Ratification | 04/09/1900 | |
| BOLIVIA | Accession | 07/02/1907 | |
| BRAZIL | Accession | 25/02/1907 | |
| BULGARIA | Signature | 29/07/1899 | |
| BULGARIA | Ratification | 04/09/1900 | |
| BYELORUSSIA S S R | Succession | 04/06/1962 | |
| CHILE | Accession | 19/06/1907 | |
| COLOMBIA | Accession | 30/01/1907 | |
| CUBA | Accession | 17/04/1907 | |
| DENMARK | Signature | 29/07/1899 | |
| DENMARK | Ratification | 04/09/1900 | |
| DOMINICAN REPUBLIC | Accession | 13/04/1907 | |
| ECUADOR | Accession | 31/07/1907 | |
| FIJI | Succession | 26/01/1973 | |
| FRANCE | Signature | 29/07/1899 | |
| FRANCE | Ratification | 04/09/1900 | |
| GERMANY | Signature | 29/07/1899 | |
| GERMANY | Ratification | 04/09/1900 | |
| GREECE | Signature | 29/07/1899 | |
| GREECE | Ratification | 04/04/1901 | |
| GUATEMALA | Accession | 02/05/1906 | |
| HAYTI | Accession | 24/05/1907 | |
| HONDURAS | Accession | 21/08/1906 | |
| ITALY | Signature | 29/07/1899 | |
| ITALY | Ratification | 04/09/1900 | |
| JAPAN | Signature | 29/07/1899 | |
| JAPAN | Ratification | 06/10/1900 | |
| KOREA | Accession | 17/03/1903 | |
| LUXEMBOURG | Signature | 29/07/1899 | |
| LUXEMBOURG | Ratification | 12/07/1901 | |
| MEXICO | Signature | 29/07/1899 | |
| MEXICO | Ratification | 17/04/1901 | |
| MONTENEGRO | Signature | 29/07/1899 | |
| MONTENEGRO | Ratification | 16/10/1900 | |
| MONTENEGRO | Succession | 01/03/2007 | 03/06/2006 |
| NETHERLANDS THE | Signature | 29/07/1899 | |
| NETHERLANDS THE | Ratification | 04/09/1900 | |
| NETHERLANDS THE | Declaration | 18/10/2010 | |
| NICARAGUA | Accession | 17/05/1907 | |
| NORWAY | Accession | 01/01/1905 | |
| NORWAY | Ratification | 05/07/1907 | |
| PANAMA | Accession | 20/07/1907 | |
| PARAGUAY | Accession | 12/04/1907 | |
| PERSIA | Signature | 29/07/1899 | |
| PERSIA | Ratification | 04/09/1900 | |
| PERU | Accession | 22/01/1904 | |
| PORTUGAL | Signature | 29/07/1899 | |
| PORTUGAL | Ratification | 04/09/1900 | |
| ROUMANIA | Signature | 29/07/1899 | |
| ROUMANIA | Ratification | 04/09/1900 | |
| RUSSIA | Signature | 29/07/1899 | |
| RUSSIA | Ratification | 04/09/1900 | |
| SALVADOR | Accession | 20/06/1902 | |
| SERBIA | Signature | 29/07/1899 | |
| SERBIA | Ratification | 11/05/1901 | |
| SIAM | Signature | 29/07/1899 | |
| SIAM | Ratification | 04/09/1900 | |
| SOUTH AFRICA | Succession | 10/03/1978 | |
| SPAIN | Signature | 29/07/1899 | |
| SPAIN | Ratification | 04/09/1900 | |
| SWEDEN | Ratification | 05/07/1907 | |
| SWEDEN AND NORWAY | Signature | 29/07/1899 | |
| SWITZERLAND | Accession | 20/06/1907 | |
| TURKEY | Signature | 29/07/1899 | |
| TURKEY | Ratification | 12/06/1907 | |
| UNITED KINGDOM | Signature | 29/07/1899 | |
| UNITED KINGDOM | Ratification | 04/09/1900 | |
| UNITED STATES OF AMERICA | Signature | 29/07/1899 | |
| UNITED STATES OF AMERICA | Ratification | 09/04/1902 | |
| URUGUAY | Accession | 21/06/1906 | |
| VENEZUELA | Accession | 01/03/1907 | |
| YUGOSLAVIA | Accession | 11/04/1994 | |