Patents - 1958
Microwave tube
Charles K. Birdsall and Dean A. Watkins
U.S. Patent 2,859,374. November 1958
Traveling-wave tube
Charles K. Birdsall and Lester M. Field
U.S. Patent 2,853,642. September 1958
Traveling wave tube of high forward wave impedance
Charles K. Birdsall
U.S. Patent 2,851,631. September 1958
High power traveling-wave tube
Charles K. Birdsall
U.S. Patent 2,851,630. September 1958
Traveling wave tube slow-wave structure
Thomas E. Everhart
U.S. Patent 2,846,612. August 1958
Self-Quenching Oscillator
Ivan P. Kaminow and R. J. Kircher
U.S. Patent 2,836,724. May 1958
Electron gun
Charles K. Birdsall
U.S. Patent 2,831,141. April 1958