Yes Apple designs certain things and has other companies make them for Apple, such as the A series chips. However, they do not design OLED panels. That is a tech that Samsung makes, LG makes, as well as countless others. Sure Apple likes for the panel to be flexible, or laminated to the display, but the actual quality of the panel itself is from the tech and design that the manufacturer uses to produce it.
I really don't know what you're on about as I've never once said that Apple uses proprietary tech (Exynos chips) from other companies in place of its own. Apple would never call and ask to "gives us the best you got". They would place an order for certain size and resolution displays made per their overall requirements. However, the tech that Samsung uses to produce the displays in the S6 is only used for Samsung phones themselves. There have not been any other phone OEM to use that type of panel in their devices. Samsung doesn't want to release those panels to other manufacturers yet, and it is their patents and designs on them. Unless Apple has a design process and manufacturing process patented that could come up with the panels in the S6, they are at the mercy of whatever panels they can source from other manufacturers.
Are you really suggesting that the new Qualcomm LTE modem supposedly used in the upcoming 6S has an Apple patent on it? I think Qualcomm would like to disagree.
Really, please try to understand. Apple doesn't design OLED screens, heck they don't even really design IPS displays. They source the, from other manufacturers and require certain quality conditions as well as some added conditions be met (like lamination and anti reflective coating).
Please, provide me with some sources as to any patents Apple has applied for in regards to OLED panels.