Complex sentence: Armat, armed with legal authority, independently shopped the Phantoscope to Kinetoscope Company who realized that their version of an early movie projector, the Kinetoscope, would soon be a thing of the past with the rapid advancing proliferation of early cinematic engineering.
Split into simpler sentences: Armat, armed with legal authority, independently shopped the Phantoscope to Kinetoscope. The company realized that their Kinetoscope, would soon be a thing of the past with the rapid advancing proliferation of early cinematic engineering.