In 1916, Kollmorgen, a small optical company in Brooklyn, New York was contracted to design, build and install the first workable periscope aboard the first U.S. submarine.

• 1916年，科尔摩根，小光公司在纽约布鲁克林的合同设计，建造和安装的第一个可行的潜望镜上的第一位美国潜艇。