C&A Marketing Inc., the company that produces the Polaroid Cube, has filed a lawsuit against GoPro for releasing the Hero4 Session camera. On what grounds? Well, the two cameras look almost identical. Both are shaped like a cube with rounded edges, and even though the Session is able to shoot better quality video and is slightly larger than the 1.4-cubic-inch Cube, C&A is insisting that GoPro has infringed on the design patent that it received in May this year, preventing any other camera from copying the Cube's unique look. GoPro had filed a patent related to its square camera's design in March, but that specifically covered the camera's housing.