> part of > copyright law last time I checked says if you make no effort to protect your > copyright, you can lose it.
You must have been looking at trademark law instead of copyright law the last time you checked. Retaining copyright requires no specific enforcement. Trademarks are what need active enforcement due to the concept of dilution under the Lanham Act, refer to part 3 here. Don't feel bad, a lot of people confuse the two.
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