How Can the Technology Relevance Have a Positive Value if the Market Coverage is "0"?

While a patent family might no longer be protected in any authority and therefore have a Market Coverage and Competitive Impact of "0", it still may be significant for subsequent art, as expressed in the citations it still receives or has already received from other patent families. Therefore, the Technology Relevance is calculated for both active and inactive patent families even after the expiration date of a patent family. The legal status of the patent family has no influence on its Technology Relevance.