| 9 December 1907 |
15 November 1908 |
International Agreement respecting the Creation of an International Office of Public Health |
| 5 July 1912 |
|
International Radiotelegraph Convention |
| 20 April 1921 |
31 October 1922 |
Convention and Statute on Freedom of Transit |
| 30 September 1921 |
|
International Convention for the Suppression of the Traffic in Women and Children |
| 3 November 1923 |
27 November 1924 |
International Convention relating to the Simplification of Customs Formalities and Protocol of Signature |
| 6 November 1925 |
1 June 1928 |
International Agreement regarding False Indications of Origin on Goods |
| 6 November 1925 |
|
International Convention for the Protection of Industrial Property (The Hague) |
| 24 April 1926 |
24 October 1930 |
International Convention relative to Motor Traffic |
| 25 September 1926 |
9 March 1927 |
International Convention with object of Securing the Abolition of Slavery and the Slave Trade |
| 25 November 1927 |
1 January 1929 |
Convention regarding Radiotelegraphy [with General Regulations and Supplementary Regulation] |
| 2 June 1928 |
1 August 1931 |
International Convention for the Protection of Literary and Artistic Works |
| 28 June 1929 |
|
Postal Union Agreement regarding Parcel Post |
| 28 June 1929 |
|
Postal Union Agreement regarding Insured Letters and Boxes |
| 9 December 1932 |
1 January 1934 |
Convention concerning International Telecommunications |
| 12 April 1933 |
1 August 1935 |
International Sanitary Convention for Aerial Navigation |
| 19 June 1933 |
15 January 1934 |
Convention Wireless Telegraphy (European Broadcasting frequencies) |
| 20 March 1934 |
|
Universal Postal Union Agreement concerning Parcel Post |
| 20 March 1934 |
|
Universal Postal Union Agreement concerning Insured Letters and Boxes |
| 20 March 1934 |
|
Universal Postal Convention |
| 2 June 1934 |
1 August 1938 |
International Agreement regarding False Indications of Origin on Goods |