Sigma patents several APS-C lenses with image stabilization

Simga's 2012-234169 patent has calculations for 30mm f/2.8, 30mm f/2.5, 28mm f/2.8, 24mm f/2.8, 50mm f/2.8 and 55mm f/2.8 lenses designed for APS-C sized sensor. The interesting part is that the described lenses have built-in image stabilization. On few occasions in the past Sigma has made statements that they are not interested in developing a mirrorless interchangeable lens system camera. My guess is that those patents are for future DP compact camera models (like the DP1 and DP2). Here are some of the lens designs mentioned in the patent:

Example Focal length Fno Angle of view Constitution Aspheric surface MOD ELD glass
One 30.83 2.89 50.49 Seven elements in 5 groups Two two-sided 500mm
Five 30.77 2.47 50.43 Eight elements in 6 groups Two two-sided 500mm
Seven 28.77 2.91 53.60 Seven elements in 5 groups Two two-sided 500mm
Eight 36.83 2.92 42.87 Seven elements in 5 groups Two two-sided 500mm
Nine 24.72 2.90 90.91 Eight elements in 6 groups Two two-sided 500mm One
Ten 38.82 2.92 40.96 Seven elements in 5 groups Two two-sided 500mm
Twelve 49.97 2.91 31.29 10 sheets in 7 groups One one side 800mm One
13 49.83 2.91 31.37 10 sheets in 7 groups One one side 800mm Two
14 54.15 2.91 28.99 Eight elements in 6 groups One one side 800mm One
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