子分类：
| 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 | Whiffletree | US10806926 | 1926-05-10 | US1665244A | 1928-04-10 | WILLIAMS JAMES E |
| 122 | Draft equalizer | US14109926 | 1926-10-12 | US1650883A | 1927-11-29 | TICHOTA VENCEL J |
| 123 | Clevis hook | US75091924 | 1924-11-19 | US1650735A | 1927-11-29 | GEORGE ZEHNLE |
| 124 | Draft equalizer | US12114026 | 1926-07-08 | US1647888A | 1927-11-01 | LOUIS RUSCONI |
| 125 | Draft evener | US15753526 | 1926-12-28 | US1645569A | 1927-10-18 | WULF FRANK F |
| 126 | Hitch for draft animals | US9704826 | 1926-03-24 | US1639608A | 1927-08-16 | CHRISTIAN HOFLAND |
| 127 | Implement tongue | US66635023 | 1923-10-03 | US1622231A | 1927-03-22 | RAND CHARLES H |
| 128 | Animal-whipping device | US9576026 | 1926-03-18 | US1591888A | 1926-07-06 | WALTER ROSSOW |
| 129 | Farm wagon | US624725 | 1925-02-02 | US1588414A | 1926-06-15 | HARRISON HARVEY N |
| 130 | Draft equalizer | US66646323 | 1923-10-04 | US1556283A | 1925-10-06 | BREI JR JOHN B |
| 131 | Draft mechanism | US65429023 | 1923-07-27 | US1553580A | 1925-09-15 | WALTERS ODIN B |
| 132 | Draft rigging | US65398323 | 1923-07-26 | US1552330A | 1925-09-01 | MEIER WILLIAM F |
| 133 | Pole cap | US70477924 | 1924-04-07 | US1541269A | 1925-06-09 | MCFERRAN WILLIAM J |
| 134 | Clevis hook | US70173824 | 1924-03-25 | US1535010A | 1925-04-21 | GEORGE ZEHARLE |
| 135 | Whip-actuating device | US70291524 | 1924-03-29 | US1533003A | 1925-04-07 | OSCAR HELLER PERRY |
| 136 | Draft equalizer | US66417023 | 1923-09-22 | US1532164A | 1925-04-07 | KORBINIAN THALHAMMER |
| 137 | Singletree clip | US66663123 | 1923-10-04 | US1526281A | 1925-02-10 | HERTZER FRED A |
| 138 | Whiffletree hook | US67451823 | 1923-11-13 | US1526264A | 1925-02-10 | YSTENESS OBERT C |
| 139 | Singletree clip | US65154323 | 1923-07-14 | US1524219A | 1925-01-27 | AUGUST STACHOFSKI |
| 140 | Clevis for singletrees | US61145123 | 1923-01-08 | US1516876A | 1924-11-25 | JOHN ANDERSON |
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