Method and apparatus for maintaining emission capabilities...
Method and apparatus for maintaining emission capabilities...
Method and apparatus for monitoring vacuum degree of vacuum...
Method and apparatus for shielding feedthrough pin...
Method and apparatus for shielding feedthrough pin...
Method and circuit for extending the range of a cold cathode dis
Method and means for vacuum gauging
Molecular shield for an ionizaton vacuum gauge
Multipactor pressure gauge for use as a noninvasive vacuum tube