The upper chest development is "somewhat" genetic, not sayin you can't counteract that and make changes. COntinue to focus on Incline movements. Try Incline BB and Smith Bench Press to the upper chest/clavicle area (Guillatine Presses as one poster recommended). Also try Reverse Grip Bench Press as they have EKG studies showing a high threshold of upper chest fibers being targetd. For inner chest, make sure your grip is not too wide. A narrower grip will target the inner fibers a bit more because of the increased stretch. Another technique you can use is to do some Pec Dec Flys where you do 7-10 reps in the outter 1/3 of the motion, another 7-10 in the inner 1/3 of the motion (targetting inner chest) and finishing with 7-10 reps in the middle 1/3 ROM.
Lastly, research Eric Brosers Fiber Damage/Fiber Saturation program. I did this during one of my preps only for chest because my chest is a weak area and I got significant gains while dieting. Basically the program starts witha negative emphasis move, a stretch emphasis move, and finishes with a muscle saturation/occlusion move. For example:
Inc BB Bench (4-6 second negative) - 3 X 3-4 Reps + 2 Forced Reps
Low Inc DB Bench (2 sec negative) - 3-4 X 4-6 Reps
Inc DB Fly (Hold stretch position for 3-4 seconds) - 3 X 6-8 Reps
SS: Pec Dec Fly/Smith Bench Press or Mach Bench - 2-3 X 15-20 Each