IP Market Intelligence

The Data Layer: Public IP Registers Explained for BD Leaders

May 24, 2027 · 4 min read · LeadLex Editorial

Public IP registers are the most underused data layer in legal business development. Every meaningful BD signal in intellectual-property practice — new filings, transfers of representation, jurisdictional expansion, oppositions, post-grant motion — is sitting in a public register somewhere, free to read, structured enough to parse, and updated continuously. The firms that win on BD are the ones that read these registers systematically. The firms that do not are competing on relationships alone.

This is a practical map of the registers that matter and the signals each one actually produces.

EPO Register

The European Patent Office Register is the primary source of signal for European patent prosecution and opposition practice. It exposes the full prosecution history of European applications and patents — applicant changes, representative changes, examiner communications, opposition filings, appeals, and validations into national jurisdictions after grant.

The BD signals worth tracking are representative changes (a client moving counsel, or a prospect signalling dissatisfaction with current counsel), opposition filings (a moment where the patentee needs defence counsel and the opponent needs offence counsel), and validation patterns after grant (which jurisdictions the patentee is investing in, and where the firm's local capability is relevant).

USPTO

The United States Patent and Trademark Office publishes both patent and trademark data through PAIR, the public PAIR successor systems, and TSDR. The volume is enormous and the structure is well-documented. For a non-US firm, the most useful BD signals are continuation filings, divisional filings, and reexamination or post-grant proceedings affecting clients with European or Asian portfolios, where the US activity is a leading indicator of work in other jurisdictions.

For US trademark practice specifically, TSDR exposes oppositions, cancellations, and office action patterns that map directly to BD conversations with brand owners.

EUIPO

The European Union Intellectual Property Office Register covers EU trademarks and registered Community designs. It is the cleanest single source of BD signal in European trademark and design practice. Filings, oppositions, cancellations, transfers, and representative changes are all visible and structured.

The design data is particularly underused. A surge of registered Community Design filings from a single applicant, especially across multiple Locarno classes, is one of the most reliable upstream signals in design rights BD.

WIPO PCT and Madrid

WIPO operates two BD-relevant systems. PATENTSCOPE exposes PCT applications, which are the leading indicator of international patent strategy. A PCT filing tells you that the applicant is considering multi-jurisdictional protection, and the national phase entries that follow over the next thirty to thirty-one months are the moment when local counsel decisions are made.

The Madrid system exposes international trademark registrations and the designations chosen for each. A Madrid designation pattern reveals the geographies a brand owner is prioritising and the moments when local trademark counsel will be needed for office actions, oppositions, and renewals.

Both systems are particularly useful because they expose strategic intent earlier than national filings do.

JPO

The Japan Patent Office publishes patent and trademark data through J-PlatPat. For non-Japanese firms, the BD signal worth tracking is the inbound and outbound flow — Japanese applicants filing internationally produce work for non-Japanese counsel, and non-Japanese applicants filing in Japan produce work for Japanese counsel. A firm with referral relationships in either direction can use J-PlatPat to identify the right moments for warm contact.

KIPO

The Korean Intellectual Property Office publishes through KIPRIS. The structure is similar to JPO, and the BD logic is similar. Korean filings by major Korean applicants, particularly in semiconductors, displays, batteries, and consumer electronics, are heavily concentrated and produce predictable downstream work in Europe and the United States.

CNIPA

The China National Intellectual Property Administration publishes patent, trademark, and design data. The volume is the largest of any single jurisdiction. The BD signal that matters most for non-Chinese firms is the outbound flow — Chinese applicants filing in Europe, the United States, and elsewhere — which is visible both in CNIPA data and in the corresponding receiving offices. A firm that monitors the outbound flow can identify Chinese applicants who are scaling international filing programmes and may be candidates for foreign counsel relationships.

UPC

The Unified Patent Court is the newest source of BD signal in European IP practice. Its register exposes filings, parties, representatives, and procedural milestones across the divisions. For litigation BD, the UPC register is now essential reading — it identifies new disputes within hours of filing, reveals which counsel are being chosen for which technologies and divisions, and surfaces the adjacent parties who may need their own representation.

How a BD operation actually uses this

Reading these registers manually is not viable. The volume is too high, the formats are too varied, and the signal-to-noise ratio is too low without filtering against the firm's specific account map and practice priorities.

Lexi reads the registers continuously, normalises the data across jurisdictions, scores filings against the firm's accounts and prospects, and surfaces the signals that warrant a partner's attention. She does not write the legal advice or interpret the prosecution history. She maintains the connective layer that turns public data into timely, account-specific BD signal — so the partners spend their time on the conversations, not on the searching.