Patents Represented by Attorney Krischstein, et al.

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  • Hollow waveguide directional coupler
    Patent number: 7671700
    Abstract: A hollow waveguide directional coupler comprises two hollow waveguide sections that are coupled to each other by a plurality of coupling openings formed in a wall extending between the hollow waveguide sections. Two adjacent coupling openings have a distance of 3?g/4. from each other, ?g being the wavelength of the nominal center frequency of the operating frequency range of the directional coupler.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: March 2, 2010
    Assignee: Ericsson AB
    Inventors: Uwe Rosenberg, Konstantinos Beis
  • Closure for a waste outlet
    Patent number: D430652
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: September 5, 2000
    Inventors: Guillaime Du Toit, Petrus Johannes Veldman