# Patents already have fairly rich classifications (IPC and CPC) — did you
lean on these hierarchical…

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Patents already have fairly rich classifications (IPC and CPC) — did you lean
on these hierarchical classification tags when training your categorization
model?

By [John Ohno](https://medium.com/@enkiv2) on [January 5,
2020](https://medium.com/p/eba28918354f).

[Canonical link](https://medium.com/@enkiv2/patents-already-have-fairly-rich-
classifications-ipc-and-cpc-did-you-lean-on-these-hierarchical-eba28918354f)

Exported from [Medium](https://medium.com) on September 18, 2020.