Which trademark category does real estate agency property belong to? Housing agencies and real estate are both the same industry. Housing agencies are brokers and real estate agents that belong to Class 36; the following is the industry information of Class 36: Class 36 Insurance; Financial Affairs; Monetary Affairs; Real Estate Affairs. ?3601 Insurance? 3602 Financial Affairs? 3603 Valuation of Treasures? 3604 Real Estate Affairs? 3605 Brokerage? 3606 Guarantee? 3607 Charity Fundraising? 3608 Trusteeship Management? 3609 Pawn