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