Lineages could claim copyright of children and their works as derivative. Entire families could claim copyright of their descendants and all works related. Each new generation resets the timer on expiration if the copyright expirations still apply.
Just pick up the fence and move it further north a few meters every year.
Lineages could claim copyright of children and their works as derivative. Entire families could claim copyright of their descendants and all works related. Each new generation resets the timer on expiration if the copyright expirations still apply.