Tubes for determining the presence, intensity, density or energy of radiation or

Official title: Tubes for determining the presence, intensity, density or energy of radiation or particles ({discharge tubes using igniting by associated radioactive materials or fillings, e.g. current stabilising tubes H01J17/32} ; photoelectric discharge tubes not involving the ionisation of a gas H01J40/00 {; discharge tubes for measuring the pressure, partial pressure of introduced gas or for detecting presence of gas H01J41/02; ionisation chambers using a solid dielectric G01T3/008})

H01J47/00 (Tubes for determining the presence, intensity, density or energy of radiation or) appears on 548 US grants and 259 published applications in this corpus.