| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Transmission system | US9875826 | 1926-03-31 | US1718950A | 1929-07-02 | FIELD FRANK E |
| 122 | Electrical transformer | US25674828 | 1928-02-24 | US1695122A | 1928-12-11 | FRANCIS PHILLIPS CHARLES |
| 123 | Transformer | US15468826 | 1926-12-14 | US1690154A | 1928-11-06 | MILTON ALDEN |
| 124 | Coil mounting | US14843926 | 1926-11-15 | US1659062A | 1928-02-14 | RICHARD VARLEY |
| 125 | Transformer | US72606724 | 1924-07-15 | US1634923A | 1927-07-05 | THULLEN LOUIS H |
| 126 | Choke-coil amplification unit | US10575726 | 1926-04-30 | US1615224A | 1927-01-25 | HILER EDWARD E |
| 127 | Induction coil | US55080622 | 1922-04-08 | US1606755A | 1926-11-16 | FIELD FRANK E |
| 128 | Transformer | US3032925 | 1925-05-14 | US1603313A | 1926-10-19 | BURKET HENRY E |
| 129 | Audiofrequency transformer | US6675825 | 1925-11-04 | US1588074A | 1926-06-08 | WHITE CHARLES D; MOSS DAVID H |
| 130 | Transformer | US68106823 | 1923-12-17 | US1579955A | 1926-04-06 | SCHERMERHORN JOHN L; FREDERICK GOERTZ |
| 131 | Transformer | US65387023 | 1923-07-26 | US1561204A | 1925-11-10 | BEERS ROLAND F |
| 132 | Audio-frequency transformer | US73347824 | 1924-08-22 | US1536451A | 1925-05-05 | NOWOSIELSKI EDWARD B |
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