ATOMLIGHT
RADIOACTIVATED LIGHT-GIVING ELEMENTS FOR USE AS LIGHT STANDARDS FOR CALIBRATION OF LIGHT SENSITIVE INSTRUMENTS, AS MARKERS FOR VEHICLES, OBSTRUCTIONS, EMERGENCY EXITS, AND EQUIPMENTS, AND AS LIGHT SOURCES IN ARTICLES CONTAINING THE SAME, INCLUDING SIGNALING DEVICES, MARKERS , AND SIGNS
Cancelled · May 28, 1957 · 72030927 ·
