Radiant energy – Radiant energy generation and sources – Plural radiation sources
Reexamination Certificate
2011-03-08
2011-03-08
Souw, Bernard E (Department: 2881)
Radiant energy
Radiant energy generation and sources
Plural radiation sources
C250S42300F, C250S424000, C250S427000, C250S493100, C250S281000, C313S341000, C313S343000, C313S271000, C313S272000, C313S273000
Reexamination Certificate
active
07902529
ABSTRACT:
An electron source can selectively provide a first stream of electrons that travels in a direction along an imaginary line to a location remote from the electron source, or a second stream of electrons that travels in the direction along the line to the location. The electron source includes a first electron emitter for selectively emitting electrons for the first stream, and a second electron emitter for selectively emitting electrons for the second stream. A different aspect relates to a method for operating an apparatus having an electron source that includes first and second electron emitters. The method includes selectively producing a first stream of electrons that travels from the first electron emitter in a direction along an imaginary line to a location remote from the electron source, or a second stream of electrons that travels from the second electron emitter in the direction along the line to the location.
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Guckenberger George B.
Quarmby Scott T.
Allred David E.
Haynes and Boone LLP
Logie Michael J
Souw Bernard E
Staggs Michael C.
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