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. In many countries, a use is required to be commercial (or to have a commercial purpose) to constitute patent infringement..
An important part in this search is the date, sometimes a product infringes a subject patent but limited to date. In that case the product needs to be thoroughly analysed in different databases.
Date limitation: >= Earliest Priority Date