Patented June 13, 1944                                                                        2,351,055 UNITED STATES PATENT OFFICE  2,351,055 TUBE FOR PRODUCING MULTIPLE WAVELENGTHS George Lakhovsky, New York, N. Y.; Anne-Marie Louise Lakhovsky, administratrix of said George Lakhovsky, deceased, assignor to Henry S. Blum, Chicago, Ill. Application November 21, 1941, Serial No. 420,006 11 Claims. (Cl. 250-33) This invention relates generally to electric devices … Continue reading Lakhovsky’s 1944 Tube MWO Patent