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| US5017938 | 1 maj 1990 | 21 maj 1991 | Andrew Corporation | UHF-TV broadcast system having circular, non-coaxial waveguide transmission line for operation in the TE.sub.11 mode |
| US6853343 | 15 feb 2002 | 8 feb 2005 | Harris Corporation | Polarization plate |
| US6970138 | 5 apr 2004 | 29 nov 2005 | Harris Corporation | Polarization plate |
