Ocean Tomo’s valuation system for rating patents was developed by California patent lawyer Jonathan Barney, who now works for the firm. Barney’s key insight was that companies, which are required to pay the U.S. Patent Office every four years to maintain their patents, would only do so if the patented technology was proving to be valuable. Barney identified 53 factors in a patent document that indicated whether a patent was likely to be renewed — that is, whether it was valuable.
For its index, Ocean Tomo evaluated the patents issued by the patent office according to these factors and then assigned each one a value relative to the others. Finally, using this rating system, Ocean Tomo selected 300 publicly traded companies that own what were found to be the most valuable patents relative to the company’s book value. (Ocean Tomo Catches the Wave)