Here's what I've got:
Crescent Firearms was in business in Norwich, Conn from 1888 to 1893.
It was merged with N.R. Davis in the early 1900's by H&D Folsom to form Crescent-Davis.
In early 1930, Savage Arms bought Davis-Warner from Folsom.
In late 1930 Savage bought Crescent Firearms Norwich Conn, and formed a new Crescent-Davis Arms Corp of Norwich.
Crescent-Davis operated independently of J. Stevens Arms Co.
In 1933 the company moved Crescent-Davis assets to Chicopee Falls, MA and allowed the state of Connecticut to have the buildings in lieu of taxes owed.
Mr. A.H. Fox started up in 1896 in Baltimore, MD.
After this Fox was hired by Baltimore Gun Co from 1900 to 1903.
After this Fox formed the Philadelphia Gun Co where predecessors to the Fox brand guns were made.
Fox went on to form the A.H. Fox Gun Co in 1905, which remained in business until 1930.
Savage Arms of Utica bought the company and produced guns under the Fox name until 1942 when all Fox guns except the cheaper Model B series guns were discontinued.
Fox brand guns continued to be assembled by Savage from left over parts as late as the 1960's.
Hartford Arms company was in business from 1929 until 1932.
In 1932 the company was bought by High Standard Mfg Co.