I have finally finished my Thunderbolt logos! I felt like taking on a challenge and doing the old-style Federal Sign and Signal logo, too. Here you go:
New Clear PNG:
New Backgrounded JPG:
Old Clear PNG:
Old Backgrounded PNG:
Enjoy! Took me about 45 minutes, I couldn't do it for about an hour - nobody probably even noticed the delay, though.
EDIT: Behind the scenes tour!
I started out with the old-style logo. I copied the logo from the US Patent site, then just drew over it onto a separate layer. Deleted the logo, then ta-da! You've got yourself a nice new logo.
I then found a "FS" logo from Google Images, made it red, then replaced the old Sign and Signal logo with it. I added the yellow background on both versions, then posted them here!
If at first you don't succeed, destroy all evidence indicating that you tried.
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If at first you fail at executing a terrible idea, do it again.