In case we get any patents related to structures of wireless communication devices (be it phones, wireless speakers, RRUs, Base Stations, etc.), do check out this source: https://fccid.io/. It states that every wireless device being sold in US has to be registered with a unique FCC ID and this is where they can be explored. Although the site itself is not searchable on the basis of keywords, a site specific search using Google along with the necessary keywords could yield in good results.(Exemplary Link)
Gaurav Sahni
Team Lead, Patent Search Team – GreyB