47!

I missed two Chinese makers that I have heard of and one Romanian one that I have never heard of. \:\)

Some of them are tricky, either old logos or just very small parts of their logo (Mitsubishi almost got me).

M80v2 | VP150v2 | QS8v2
SVS Pci+ 20-39
Emotiva UMC-1 & LPA-1
M22ti + T-Amp, in the Office