My contract is a mix of the AIGA, SEGD and various contracts I have seen thrugh the years
This is a portion of my ownership section for my graphic and environmental graphics...
All artistic expression, design concepts, sketches, notes, photographs,
drawings, specifications, computer files and the right to create copies or
derivative works there from shall remain the property of the designer
whether the project for which they are made is executed or not.
and this for logo design:
Upon payment of all fees and expenses, the designer transfers ownership of
the final logo, logotype and/or typography developed to the client.