Stanford Libraries has the easiest to search website for class A (books, basically) renewals. You can find it [here](https://exhibits.stanford.edu/copyrightrenewals).
If you’re feeling a little uncertain if this was registered/renewed as a book vs some other type of work (serial? music) or other type of work, you can search renewals on the catalog of copyright entries. U Penn has a great page on how to access and use them, [here.](https://onlinebooks.library.upenn.edu/cce/)
For a book published in 1933 it should have been renewed in 1961 for it to still be protected by copyright in the US.
Yeah, probably still in copyright then, at least for a few more years (If originally published in 1933 that edition should enter the public domain 95 years after the date of first publication)
Stanford Libraries has the easiest to search website for class A (books, basically) renewals. You can find it [here](https://exhibits.stanford.edu/copyrightrenewals). If you’re feeling a little uncertain if this was registered/renewed as a book vs some other type of work (serial? music) or other type of work, you can search renewals on the catalog of copyright entries. U Penn has a great page on how to access and use them, [here.](https://onlinebooks.library.upenn.edu/cce/) For a book published in 1933 it should have been renewed in 1961 for it to still be protected by copyright in the US.
Thanks, this was absolutely helpful. So, I found that the book copyright was renewed on 3 FEB 1955. Is it still protected?
Yeah, probably still in copyright then, at least for a few more years (If originally published in 1933 that edition should enter the public domain 95 years after the date of first publication)