The only name I can find associated with Prague Electric is Ernest Henry Brownell. This connection lies in the address listed in the the Brown address book of the living graduates for 1894-1901. The address, 107 Westminster Street in Providence, is the same listed for Parague Electric 8
Ernest Henry Brownell was a 1888 Brown University graduate and 1890 graduate of the Massachusetts Institute of Technology. Ernest was named an instructor in civil engineering at Brown, 1894-1902. 9
In 1902 Brownell joins the Sons of the American Revolution 10.
In 1909 there is a report of two wireless companies filling Navy contracts, Prague Electric Company from Providence and Massie Wireless Telegraph Company 2.
The McGraw Electrical Directory in 1910 their address is listed as 107 Westminster Street in Providence 5. In 1911 they are listed in the Electrical Record as making X-Ray Outfits 7.In 1914 there is a listing of some of their equipment in the book Wireless Telegraph Construction for Amateurs 1 by Alfred Powell Morgan. Also in 1914 there are listings for Prague making X-Ray equipment and pottery bases for lamps 3
In in 1915 6 & 1916 4 they were listed as just making X-Ray equipment.
By Alfred Powell Morgan
D. Van Nostrand Company
1 Wireless Telegraph Construction for Amateurs
2 Electrical Review Volume 54, 1909
3 Electrical Record and Buyer's Reference, Volume 16, 1914
4 Electrical Review and Western Electrician, 1916
5 McGraw Electrical Directory, 1910
6 Electrical Review and Western Electrician, 1915
7 Electrical Record, 1911
8 Brown Living Graduates for 1894-1901
9 Ernest Henry Brownel Abstract
10 Application to The Sons on the American Recolution, 1902