"AMERICAN FIREARMS MAKERS" by A. Merwyn Carey (cw 1953) shows:
"Griffith, Joseph about 1870. General gunsmith and percussion rifle maker at Louisville, Kentucky."
It also shows:
"Griffiths, John 1839-1865. Maker of flintlock and later, percussion Kentucky rifles at Cincinnati, Ohio."
"AMERICAN GUN MAKERS", L.D. Satteriee & Major Arcadi Gluckman (U.S.Army) (cw 1945) says:
"GRIFFITH, Joseph-- Louisville, Ky., 1869-1870. Maker of percussion rifle locks."
"GRIFFITHS, John-- Cincinnati, Ohio, 1839, to about 1865. Contracted Dec. 6, 1842 for 5,000 rifles at $13.00 each to be delivered at 1,000 per annum. The contract was taken over by E. Remington & Son due to Griffiths' inability to make deliveries.
Associated with Henry L. Siebert in 1852-54. Rifles and shotguns."