This applies to Tintin, too - a big deal, given that Tintin is managed by a notorious copyright bully who delights in cruelly terrorizing fan artists. Tintin is joined in the public domain by Buck Rogers, another old-timey character whose owners are scumbag rent-seekers.
Congress buried the public domain alive in 1976, dumped a load of gravel over its grave in 1998, but miraculously, we've managed to exhume the PD, and it has been revived and is showing signs of rude health.
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