Very interesting indeed: had no idea how Pyrotronics went from Baker Industries to Cerberus like that (I know Cerberus & Pyrotronics were once independent but how they became related I didn’t know). We still don’t know when exactly Pyrotronics was founded (& thus how far they go back) or when they were supposedly taken over by Baker though I think.
That document is very confusing: first it says that Cerberus supposedly both gladly & willingly gave Baker permission to manufacture their DI-3 smoke detector for sale in North America, but then accused Baker of in fact not having permission to make it yet making it anyway almost a decade later! (not only that but they seem to be calling their own detector “technically unsound, unsafe and inferior,”! (unless they were referring to Baker’s/Pyrotronics’ version specifically, even though it doesn’t seem like they were)
On a somewhat-related note, any idea if Pyrotronics (& maybe by extension the “Pyr-A-Larm” & “Pyr-A-Lon” brand names) was once their own company or if they were instead simply a brand name used by Baker Industries? (though given Pyrotronics seemingly became part of the new Cerberus Pyrotronics in 1988 that would point to the former, & that Baker simply acquired them at some point along the way)