| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Reactance parametric amplifier | US39195164 | 1964-08-25 | US3313950A | 1967-04-11 | ANTONIN GLANE |
| 42 | Amplification of short and ultra short electromagnetic waves | US85785959 | 1959-12-07 | US3214704A | 1965-10-26 | HERBERT HOLZWARTH |
| 43 | Device for modulating and/or amplifying electric signals | US41389854 | 1954-03-03 | US2920276A | 1960-01-05 | HEINRICH JONKER GERARD; MEYER CLUWEN JOHANNES |
| 44 | Bridge type power amplifier | US47925854 | 1954-12-31 | US2850585A | 1958-09-02 | MILTON GREEN |
| 45 | Magnetic or dielectric amplifier | US41593954 | 1954-03-12 | US2835747A | 1958-05-20 | MEIJER CLUWEN JOHANNES |
| 46 | Dielectric amplifier employing ferroelectric materials | US31527752 | 1952-10-17 | US2795648A | 1957-06-11 | MASON WARREN P |
| 47 | Electric amplifiers with nonlinear piezoids | US25550751 | 1951-11-08 | US2773137A | 1956-12-04 | HOLLMANN HANS E |
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