[Arran]

Mike;
I seem to recall that the "Mazda" name was applied to marketing tungsten filament lightbulbs, as opposed to carbon filament bulbs, which were much dimmer. I'm not sure when G.E dropped the use of the "Mazda" name, but likely in the 1920s. The Mazda name was applied to tubes/valves manufactured by Ediswan, which originated from the Edison and Swan Electric Lamp company, I'm guessing that the Mazda name with that company also coincided with the advent of tungsten filament light bulbs.
I can remember a French class in junior high school where the teacher ran a video of French (from France not Quebec) T.V commercials, and one was for "C" cell batteries marketed under the "Mazda" name, and the teacher wondered if it had anything to do with the Japanese cars? I can remember remarking that I believed that it didn't, likely seeing that name associated with an old ad for flashlights. I'm not sure why the Japanese cars were given that name, it's not the name of the company, but it apparently debut on a three wheeled delivery vehicle prior to WW2.
Regards
Arran