First in line are some Pentax patents of what appears to be three lenses with a Micro-Four-Thirds mount:
- Pentax-MFTS 17mm F2.8 AL
- Pentax-MFTS 17mm F2.0 AL
- Pentax-MFTS 14mm F2.8 AL
And the drawings:

The next patent is from Canon and is for a “Imaging-device cleaning apparatus” which has the shape of a lens and attaches to the DSLR (patent application 7697063):
“An imaging-device cleaning apparatus is attached to a camera by engaging with a lens mount of the camera typically used for attaching a camera lens. The imaging-device cleaning apparatus includes a nozzle for removing dust and dirt in the vicinity of an imaging section of the camera, and a motor and a fan for supplying air to the nozzle to remove the dust and dirt from the vicinity of an image sensor of the camera.”

The last patent is for a in-camera HDR from Canon (patent application 12/630,594):
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