Table 2 The basic data of the IPC co-occurrence network
From: Characterizing patent big data upon IPC: a survey of triadic patent families and PCT applications
Co-IPC | Global | W-core | ||||
|---|---|---|---|---|---|---|
Nodes | Links | Frequency | Nodes | Links | Frequency | |
TP | 2004 | 115,037 | 8,453,047 | 51 (2.54%) | 101 (0.09%) | 2,122,263 (25.11%) |
PCT | 2085 | 127,535 | 13,291,821 | 65 (3.12%) | 125 (0.10%) | 3,779,366 (28.43%) |