Patent US 3275878A

Patent number	US 3275878A (click link for details and documents via Google Patents)
Title	Lead-in seal for evacuated envelope of an electron discharge device for connecting electrodes located within said envelope to a voltage source positioned outside said envelope
Inventors	William H Wilbanks
Company	Tektronix Inc
Filing date	1963-02-27
Grant date	1966-09-27