Technically, neither Samsung or Apple actually develops the glass used in their respective smartphones and tablets. Both companies source the glass, touch panels and whole assortment of processors from suppliers. There's nothing unusual about this.
LG Display is actually the real first company to develop curved screens ready for production. Corning seems to not care about curved glass.
Similarly, when it comes to screen resolution, Japan Display (JDI) and Sharp are the real "first" companies, and they sell to Samsung, Apple, ASUS, HTC, Google, etc. Samsung and Apple just market the technology as being their first in their own phones, but notice that these companies never say that they invented any panel-related technology. What happens is that companies that own factories like Foxconn, TSMC and Samsung do will manufacture based on what JDI and Sharp have provided. So everyone is really a middleman using technology invented by someone else.
Here's a tech tidbit: The reason many current smartphones use the 1920x1080 resolution isn't so much because it's a high definition standard (though the 1080p marketing helps), but rather because that's the limit that JDI had been able to develop up to that point in time. It's a technical/R&D limitation from the inventor (JDI). The 1136x640 res panel on the iPhone 5/5S/5C is also from JDI and it's not an Apple limitation but rather the best that JDI was able to produce at the time of the iPhone 5 release (2012).
So celebrate companies like LG Display and Sharp who are the real inventors.