Of the 23 technologies listed in Table \ref{table:TLC_transition_points}, 20 were found to have patent data available from during the emergence stage (i.e. excluding incandescent lights, landline telephones, and wireless data transfer). As such only those technologies with patent data available during the emergence stage are considered in the analysis that follows.
For subsequent expansion of this analysis to additional technologies where evidence is not immediately apparent for the definition of these segments, a nearest neighbour pattern matching process was also developed as outlined in section \ref{637710} based on the work of Gao \cite{Gao_2013}. This methodology is not discussed in further detail in this paper.