Focusing means for cathode ray tubes

Focussing and deflecting system comprising a ferromagnetic...

Focussing mask

Formation of closely packed microspots and irradiation of same

Forward and reverse scanning for a beam instrument

Four-electrode fluorescent lamp and the circuit for...

Fourier transform ion cyclotron resonance mass spectrometer...

Fourier transform mass spectrometer and method for...

Fourier transform quadrupole mass spectrometer and method

Fragmentation methods for mass spectrometry

Fragmentation methods for mass spectrometry

Fragmentation of ions by resonant excitation in a high order...

Fragmentation of ions by resonant excitation in a low...

Fragmentation of ions by resonant excitation in high order...

Fragmenting ions in mass spectrometry

Frame for high intensity discharge lamp

Frame-making method

Frameless shadow mask for color cathode ray tube

Frameless shadow mask for color cathode ray tube

Free electron diode oscillator