Complex sentence: In the mid- 1990s, Lamar Hires and Dive Rite produced the first commercial sidemount diving system, focused on the newly released'Transpac' harness.
Split into simpler sentences: In the mid- 1990s Lamar Hires designed the first commercial sidemount diving system and this was manufactured by Dive Rite. They focused on the newly released'Transpac' harness.