* Original Works: The original copyright for the Winnie-the-Pooh books, including the poems, belonged to A.A. Milne himself. He held these rights until his death in 1956.
* Post-Death Rights: Upon Milne's death, the copyright for his works passed to his estate. His estate then licensed the rights for these works to various publishers.
* Current Rights: The copyright for the Winnie-the-Pooh books, including the poems, is now in the public domain in most of the world. This is because the copyright term for works created before 1925 has expired.
* Exceptions: It is important to note that in some countries, such as the United States, the copyright for the Winnie-the-Pooh works has been extended through various copyright renewals and extensions. Therefore, the works might still be protected under copyright in those specific countries.
Therefore, depending on the country and specific poem, the copyright situation can vary.
If you're unsure about the copyright status of a specific poem, it's best to consult with a copyright attorney or legal professional.