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Trademark Dashboard – UK Trademark Search & ClearanceUK Trademark — IPO
IO
Application UK00000806428 · Registered
Quick Facts
| Application Number | UK00000806428 |
| Status | Registered |
| Owner | Phaidon Press Limited |
| Filed | 1960-05-26 |
| Registered | 1960-05-26 |
| Renewal Due | 2035-05-26 |
| Type | Individual |
| Feature | Figurative |
| Attorney | See claim section below |
Is this trademark active?
Yes. IO is currently a registered UK trademark, with renewal due on 2035-05-26. It is protected under UK intellectual property law and can be enforced against infringing uses.
Goods & Services
The specification below is taken directly from the filed record at the UK IPO for each Nice class this trademark is registered in.
Class 16 — Paper & Printed Matter
Printed books.
Device Elements (Vienna Classification)
This figurative mark is indexed under the following Vienna categories by the UK IPO:
- 26.04.00 — Geometrical figures and solids
- 28.05.00 — Inscriptions in various characters
Timeline
- Filed: 1960-05-26
- First published: 1961-08-16 (Journal 4329)
- Registered: 1960-05-26
- Renewal due: 2035-05-26
About This Trademark
'IO' is a registered trademark on the UK IPO register, owned by Phaidon Press Limited. The application (UK00000806428) was filed on 26 May 1960 and registered on 26 May 1960. The registration is set to expire on 26 May 2035.
This mark is recorded under Class 16 (paper, cardboard & printed matter).
The trademark is represented by D Young & Co LLP.
Frequently Asked Questions
Who owns 'IO'?
According to the UK IPO register, 'IO' is owned by Phaidon Press Limited.
Is 'IO' currently a registered trademark?
Yes — 'IO' is recorded as registered on the UK IPO register.
What goods or services does 'IO' cover?
'IO' is registered in Class 16 (paper, cardboard & printed matter). The filed specification reads: Class 16: Printed books.
When was 'IO' first filed?
The application for 'IO' was filed on 26 May 1960 and the trademark was registered on 26 May 1960.
When was 'IO' first published?
The UK IPO first published / advertised 'IO' on 16 August 1961.
When does 'IO' need to be renewed?
The current registration of 'IO' is recorded as valid until 26 May 2035, at which point it will need to be renewed to remain in force.
Attorney of Record
This trademark has an attorney of record listed on the UK register. The firm has not yet claimed its listing on Trademark Dashboard.
Cross-Register Filings
Trademarks matching "IO" have been found on the following foreign registers. Exact matches appear first; where the name also appears inside longer filings, those are listed below as similar marks. Same-owner matches are flagged where applicant names align across offices.
US — United States (USPTO)
| Mark | Ref | Status | Filed | Same Owner |
|---|---|---|---|---|
| EXOSEARCH.IO | 99669636 | 630 | 2026-02-25 | — |
Similar names
| Mark | Ref | Status | Filed | Same Owner |
|---|---|---|---|---|
| IO500 | 99681826 | 630 | 2026-03-04 | — |
| ION SLEEP | 99681849 | 630 | 2026-03-04 | — |
| ION EDGE | 99679519 | 630 | 2026-03-03 | — |
| ION X | 99671665 | 630 | 2026-02-26 | — |
Australia — Australia (IP Australia)
| Mark | Ref | Status | Filed | Same Owner |
|---|---|---|---|---|
| Tacit IO | 2555181 | published | 2025-06-16 | — |
| aPHelar-IO Immuno-Oncology | 2530380 | protected | 2025-03-22 | — |
| io | 2521730 | published | 2025-02-13 | — |
Similar names
| Mark | Ref | Status | Filed | Same Owner |
|---|---|---|---|---|
| IOHANNA | 2625318 | accepted | 2026-02-16 | — |
| IONIC SLEEK | 2613328 | accepted | 2025-12-18 | — |
Data Source
UK trademark data is supplied by the Intellectual Property Office under the Open Government Licence v3.0.
The “About This Trademark” summary and FAQ above are AI-generated from the register data shown on this page. They are factual summaries only — always verify details against the official register before making legal decisions.