sdandrea1 It does not have to look like, or be identical to, the item infringed upon. A golf ball cannot be patented, as such. Only the process to make it what it is.
One cannot build and sell a hydraulic shaft puller, for example. It is patented. You may build/sell any puller though, as long as it does not use hydraulics.
Patent infringement is the commission of a prohibited act with respect to a patented invention without permission from the patent holder. Permission may typically be granted in the form of a license. The definition of patent infringement may vary by jurisdiction, but it typically includes using or selling the patented invention.