Is it ok to copy a W5 head and make it better or are we just mad at Speedmaster

pittsburghracer said
Ok test time

1. How long is a patent good for?

2. Who is responsible for fees involved in fighting patent claims?

3. If a patent is filled in America is it illegal for someone in China to go against the patent and copy a product?

Is a patent valid in every country?
Patents are territorial rights. In general, the exclusive rights are only applicable in the country or region in which a patent has been filed and granted, in accordance with the law of that country or region.