I remember hearing stories about oil companies buying up battery patents. But this may be because they want to collect the royalties, not necessarily to suppress any kind of research. But like you said, I don’t think there is any evidence… But if they were suppressing the technology, we probably would never know about it.
Part of the reason I went with a smaller (ha, 55 inch is ”smaller") lg OLED because it had one central base stand, opposed to the larger 65 in OLED that didn’t have just one central stand.