Annular hollow cathode discharge apparatus
United States Patent 3381157

Inventors:
Ferreira, Fernand J.
Publication Date:
04/30/1968
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Assignee:
UNITED AIRCRAFT CORP
Primary Class:
313/348
Other Classes:
313/339, 219/121.270, 313/618
International Classes:
H01J17/06; H01J37/077; H01J17/04; H01J37/06
Foreign References:
GB888609A