Time-series statistics -Patent counts over time -Citation counts over time (citations from/to the portfolio)• External citations• Internal citations• Examiner citationsCitation ratio - ratio of how often a portfolio (for a specific year) is cited relative to all patents issued in the specific year (an indicator of portfolio quality for a specific year)Citation index – weighted average citation ratios over a period of time (an indicator of portfolio quality over a period of time)Science index – the frequency of references from the portfolio to qualified scientific journals (an indicator of the scientific nature – applied vs. basic - of the technology represented by the portfolio)Technology Age – Average age of patents in the portfolio + average age of patents cited by the portfolio (an indicator of the age of the technology represented by the portfolio)Other -Top entities citing the portfolio-Top patents citing the portfolio -Top USPTO classes of the portfolio-Top inventors of the portfolioNumber of citations to the patent -External citations-Internal citations-Examiner citationsClass citation rank – rank based upon the number of citations a patent receives relative to all patents issued in the same class (an indicator of patent quality)Year/class citation rank – rank based upon the number of citations a patent receives relative to all patents issued in the same year and class (an indicator of patent quality)Science index - the frequency of references from the patent to qualified scientific journals (an indicator of the scientific nature – applied vs. basic - of the technology represented by the patent)Technology age - average age of the patent + average age of the patents cited by the patentOther-Number of claims-Number of independent claims-Number of dependent claims-Claim 1 word count-Maintenance status
