This is very simple.
Just a Titleblock Family ( .rfa file) which can then be loaded into any Revit Project for all Sheets.
The Titleblock Family will contain a Label that can be edited for address/contact info, etc., images for logo, copyright, dates, etc.
There are literally hundreds ( if not thousands ) of firms using Revit with multiple offices, so you are not re-inventing the wheel here.
Families in Revit are somewhat similar to dynamic blocks in Cad ( only better! )
Good luck.
Cliff B. Collins
Registered Architect The Lamar Johnson Collaborative Architects-St. Louis, MO