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| Number | Title | Issue Date |
| 3949324 | Surface wave device angle modulator A system for generating angular modulation comprising a balanced modulator and an adding circuit to which a surface wave device quadrature oscillator applies two signals at the carrier frequency differing 90° in phase, such phase difference being accurat... | 04/06/1976 |
| 3936751 | SWD FM detector and IF filter An SWD structure is employed in an FM receiver for signal demodulation and band limiting. An FM signal is applied to the input of an SWD patterned for bandwidth limitation. Two SWD output channels characterized by predetermined differential delays of the ... | 02/03/1976 |
