Between the World Wars, many countries, even quite small ones, had their own aviation industry. In the Baltic state of Latvia, the most modern project was the Irbitis I-16 fighter. Only a few prototypes had been built when the Soviet Union occupied the country.
has more information. The
Wikipedia entry is especially detailed - in case you are not fluent in Latvian ;-) the Google translation
is quite readable.
Interestingly, it looks very much like the fictional enemy fighter in an early scene of the 1936 Science Fiction film "Things to Come"