Trademarks Opposition Board

The Trademarks Opposition Board (TMOB) acts on behalf of the Registrar with respect to two types of proceedings: opposition proceedings and section 45 proceedings.

The TMOB comprises of a chairperson, members, hearing officers, a manager and clerks. The chair, members and hearing officers each has delegated authority from the Registrar to conduct hearings and render decisions pursuant to the Trade-marks Act and Trade-marks Regulations.

The responsibilities of the TMOB with respect to opposition and section 45 proceedings include:

  • assessing the initial request;
  • corresponding with both parties;
  • ruling on various interlocutory matters (oppositions proceedings only);
  • scheduling and conducting oral hearings; and
  • rendering decisions.

Contact Us

For general enquiries, call our Client Service Centre at 1-866-997-1936 (toll-free) or 819-934-0544 (international).

Important: When writing to TMOB, you must indicate:

  • Attention: Oppositions or
  • Attention: Section 45

Facsimile: 819-953-CIPO (2476)


Trademarks Opposition Board
Canadian Intellectual Property Office
Industry Canada
Place du Portage, Phase 1
50 Victoria Street
Gatineau, QC K1A 0C9

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