The patent system that was established in America back at the end of the 19th century has many notches in its belt. Under it, the cotton gin was patented as well as countless software designs. Some might argue that this is testament to its broad, flexible, and enduring nature.
However, others would say hogwash. An overwhelming number of patent filings today are software and tech related, the sorts of "patentable" material that was not in existence during the nascent years of this nation's founding. As it is, a single body of patent law presides over all sectors of patentable subject matter. Some are saying that the system is a bit long in the tooth, and costing companies time and money.