Particle accelerator

Patch antenna and method for making the same

Photocathodes

Photographic master for use in screening a color cathode ray tub

Photosensor having impurity concentration gradient

Plasma assisted modified betatron

Projection tube having an insulating layer of magnesium oxide an

Proton source

Pulsed particle beam vacuum-to-air interface

Racetrack microtron beam extraction system

Radio frequency multipole linear accelerator

Recessed anode with particulate metal deposit

Repair of open circuited gas discharge display panel conductors

Replacement device for a driver's viewer

Rotatable superconducting cyclotron adapted for medical use

Segmented RFQ accelerator

Selective color filter

Semiconductor device for the vacuum-emission of electrons

Semiconductor device with composite metal heat-radiating plate o

Semiconductor electron-current generating device having improved