Hollow waveguide and method of manufacturing the same

Optical waveguides – Optical fiber waveguide with cladding – Utilizing nonsolid core or cladding

Reexamination Certificate

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Reexamination Certificate

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07664356

ABSTRACT:
A hollow waveguide has a metal-clad pipe having an inside metal layer and an outside metal layer, and a hollow region formed inside of the metal-clad pipe. The metal-clad pipe is formed by pressure-bonding metal pipes each of which is made of a metal material different from each other.

REFERENCES:
patent: 5440664 (1995-08-01), Harrington et al.
patent: 5729646 (1998-03-01), Miyagi et al.
patent: 5957858 (1999-09-01), Micheels et al.
patent: 5995696 (1999-11-01), Miyagi et al.
patent: 8-234026 (1996-09-01), None
patent: 2002-71973 (2002-03-01), None

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