[Intellectual Property Rights]: There are two things to consider, copyright and design patent rights.
If the other party has drawings, such as engineering design drawings and product design drawings, then even if you refer to them and then draw them yourself and reproduce them for sale, it may still constitute copyright infringement.
In addition, consider that the other party may have applied for a design patent, but the protection of the design patent has a certain regional nature, that is, it is only protected in the country of application, so the risk is relatively small.
I hope the above analysis can help you solve this practical problem.