Simon Lake produced submarines for the US Navy in Bridgeport , beginning in 1913 .
The work done by John P. Holland led to submarine production by the Electric Boat Company in Groton beginning in 1924 , which continues to this day .
Simon Lake produced submarines for the US Navy in Bridgeport , beginning in 1913 , and the work done by John P. Holland led to submarine production by the Electric Boat Company in Groton beginning in 1924 , which continues to this day .