| Patents for Leonidas Gray |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 133,773 | Dec. 10, 1872 | A.W. Gray | Improvement in machines for corrugating metal plates | |
| 141,268 | Jul. 29, 1873 | A.W. Gray | Improvement in links of endless chains for horse-powers | animal powered apparatus |
| 166,456 | Aug. 10, 1875 | A.W. Gray | Improvement in grain-separators | corn and grain separators |
| 227,765 | May 18, 1880 | A.Y. Gray, L. Gray | Wrench | ratchet wrenches |
| CA-12,020 | Nov. 24, 1880 | A.Y. Gray, L. Gray | Improvements on Threshing Machines | cylinder tooth wrenches |
| 326,497 | Sep. 15, 1885 | L. Gray, A.Y. Gray | Governor | |
| 434,266 | Aug. 12, 1890 | L. Gray, A.Y. Gray | Brake for horse-powers or speed-regulators | animal powered apparatus |
| 448,957 | Mar. 24, 1891 | L. Gray, A.Y. Gray | Attachment for the separators of thrashing-machines | corn and grain separators |
