All these intellectual property laws are very confusing not only to ordinary people, but to ordinary lawyers too. It would be interesting to hear opinion of lawyer specializing in this area. In example, it would be nice to know what laws and what parts of them exactly covers this "Grumman thingy".
So far, I am only sure about trademark law, which prohibits using Grumman name, logo or their product names without their permission. Plane shape should be covered by design patent (?), but its term is relatively short (around 20 years) and should be expired by now.
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