LANE, Judge.
This appeal is from the decision of the Patent Office Board of Appeals affirming the rejection of all claims in appellants' application serial No. 363,166, filed April 28, 1964, for "Elliptical Waveguide for Electromagnetic Waves." We affirm.
The specification states that it was old in the art to use smooth-walled waveguides of elliptical cross-section, the elliptical shape contributing good (wide-band) electrical transmission characteristics...
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