Table 3 The basic data Nation-IPC co-occurrence network
From: Characterizing patent big data upon IPC: a survey of triadic patent families and PCT applications
IPC-Nation | Global | W-core | ||||
|---|---|---|---|---|---|---|
Nodes | Links | Frequency | Nodes | Links | Frequency | |
TP | 2110 | 23,837 | 5,157,334 | 58 (2.75%) | 91 (0.38%) | 1,885,327 (36.56%) |
PCT | 2228 | 54,550 | 10,400,329 | 53 (2.38%) | 109 (0.20%) | 2,941,705 (28.28%) |