- Grey - standart copyright (life of author +70)
- Red - Stamps are in Public Domain
- Yellow - Copyright to stamp expire 50 years after publication
- Brown - Copyright to stamp expire other time after publication (Iran 30 years, India 60 years)
- Green - Stamps are in public domain befora Law change (Finland - 1999, Netherlands - 1987)
Note: Laos and Afghanistan got NO copyrigt legislative, because ALL his work are in public domain
Kanada
Bearbeiten- Canadian stamps are under "Crown copyright", which expires after 50 years.
USA
Bearbeiten- Public domain if issued before 31 December 1977
Vergleich: Commons:Briefmarken