Corridor Briefs

The numbers tell a quiet story about a national IP infrastructure still maturing. Korea firms were filing patents abroad in tiny numbers, and KR firms were rarely chosen as the entry point for foreign filers' KR strategy. Volume rose steadily through the decade, but the direction never changed.

By 1999, KR received roughly 8 cases for every 1 it sent. Reciprocity wasn't bad — it was barely a concept yet.

Two corridors stood out from the receiver pattern, faintly. EP saw the highest relative outflow — KR firms were already engaging with European counsel two-way. CN was nearly invisible: fewer than 1.5K combined exchanges per year throughout the decade.

Outflow rose too, but on a slower clock. KR sent meaningful numbers to EP — a real two-way relationship there — but to the US the asymmetry stayed asymmetric. The relationship just moved more cases through it.

Roughly 3.5× more inflow than outflow at the decade's close. KR was a busier receiver, not yet a giver.

This was the decade Korea industry exported its first global wave. Corporate patents went to the US, EP and JP through American, European and Japanese counsel. The KR firm's role in that flow was downstream — receiving foreign filings, drafting, prosecuting, returning. Not yet a sender.

By 2019 the gap was decisive. KR had become a net giver in its largest corridor — the corridor that had defined its receiver identity for 25 years.

The corridor that had defined KR's receiver identity for 25 years became the corridor where it first proved itself a giver.

The other corridors shifted with it, just at different speeds. EP rebalanced near 1:1 by mid-decade. JP closed the gap but stayed receiver-leaning. CN went from invisible to balanced — by 2019, it was already exchanging multiple thousand cases each direction, an order of magnitude bigger than 2009.