Title:
Self-focusing electron beam apparatus
United States Patent 3218431
Inventors:
Stauffer, Lynn H.
Publication Date:
11/16/1965
Other Classes:
219/121.340, 373/12, 313/356, 219/121.240, 219/121.330, 315/231, 250/354.100, 219/121.270
International Classes:
H01J37/077; H01J37/24; H01J37/301; H01J37/02; H01J37/06; H01J37/30