Attorney, Agent or Firm: GUY HOULE (MONTREAL, QUEBEC, CA) Claims: I claim: 1. A temperature stable folded waveguide bandpass filter of reduced length comprising two straight waveguide sections of rectangular cross-section, at least one of said sections has opposed parallel sidewalls and opposed ...
Rio Tinto Alcan International Limited (Montreal, Quebec, CA) Primary Class: 423/127 Other Classes: 210/333.01, 423/121, 423/122, 423/123 International Classes: C01F1/00;C01F7/0646;C01F7/144 Field of Search: 423/127, 423/121, 423/123, 423/122 ...