[2][5][6] He left Pioneer in 1928 and with $500 saved while working, Paul and his brother Otto founded Kollsman Instruments Co. in Brooklyn New York.
[1][2][7][8][9] In 1929 U.S. Army Lt. James H. Doolittle was leading the development of equipment and methods for instrument flying, under the sponsorship of the Daniel Guggenheim Fund for the Promotion of Aeronautics.
[24] In 1940 Kollsman purchased 800 acres (320 ha) of land outside Manchester, Vermont from International Paper Company, and founded Snow Valley, which formally opened in January 1942, and was one of the earliest ski areas in the United States.
In 1944 Kollsman married Baroness Julie "Luli" Dorothea Baronin von Bodenhausen, an actress and author, in New York City; she died in 1951.
[1] In 1945 Kollsman purchased The Enchanted Hill, a fabulous estate in Beverly Hills, California, which contained a Mediterranean Revival main house of 10,000 square feet with 12 acres (4.9 ha) of formal gardens, which Mr. Kollsman eventually augmented to 120 acres (49 ha), designed by acclaimed architect Wallace Neff.
The estate, which was described by architectural historian Sam Watters as "fantastical", had been built in 1925 at the top of Angelo Drive by MGM screenwriter Frances Marion and her cowboy-star husband, Frederick Clifton Thomson.
Microsoft co-founder Paul Allen acquired the estate from Kollsman's widow, Eva, in 1997 for $20 million and razed the landmark house in 2000, with plans to build two 50,000-square-foot (4,600 m2) mansions in its place.