Firestone tyre company.
friskies
what logo has a red f and j
Firestone. It is an American tire company named after its founder, Harvey Samuel Firestone. The logo is usually seen in red.
a capital n-f-l. the letters in red print. bordered with a blue shield. which has eight stars and a football in the center
Porsche comes to mind
Federal is the company that make glassware imprinted with an F inside of a shield.
Fosters
F
fila
fosters
it is probably just a scratch that looks like L and F. Or it could be the jewelery company's logo.