The answer is money. Getting a patent in Massachusetts is the same as any other state.Most importantly, patent applications must be filed within one year of the date an invention is publicly disclosed. "WO" is a suffix to a patent number that indicates that the original patent application was filed under the Patent Cooperation Treaty. This site provides useful information for applicants that wish to take advantage of the electronic priority document exchange (PDX) program. This question is based upon a false premise. The distinction between a WIPO patent and a U.S. patent is a category error. Use TI= to search in the title, AB= for the abstract, CL= for the claims, or TAC= for all three. For example, TI=(safety belt). When they decided to remain where they landed in Massachusetts, they had to request permission (known as a patent) to settle there.