Porsche's solution to building a four-door convertible version of the Panamera could be revealed in the new sequence of patent drawings obtained by Autocar.

The pictures show a sytem that runs from a permanent fixed central roof section. See the Porsche Panamera convertible gallery, including the patent drawings

Recent comments from Porsche insiders indicated the car had been cancelled, but renewals and fresh patent applications in the United States indicate otherwise.

The new car has a practical four-door body that, without a traditional B-pillar, has required substantial stiffening to the Panamera’s floorpan and bulkheads to ensure sufficient structural rigidity and integrity.

Click the title for the source