Device for electron emission including device for providing work

Diamond/diamond-like carbon coated nanotube structures for...

Direct heating cathode and a process for manufacturing same

Direct heating cathode and process for producing such

Direct heating type cathode structure

Directly heated cathode

Directly heated cathode for cathode ray tube

Directly heated cathode for electron tube

Directly heated cathode structure

Directly heated cathode structure

Directly heated cathode structure

Directly heated cathode structure

Directly heated oxide cathode

Directly heated oxide cathode and production thereof

Directly heated type oxide cathode

Directly-heated oxide cathode and fluorescent display tube...

Discharge lamp and method of making same

Discharge lamp having an electrode body with a hermetically...

Dispenser cathode

Dispenser cathode