| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Charles H. Hill | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
 | 158,172 | Dec. 29, 1874 | C.H. Hill, A.W. Proctor | Improvement in machine for grinding knives | |
| 158,173 | Dec. 29, 1874 | C.H. Hill, A.W. Proctor | Improvement in belt-shifters | ||
| 2,074,844 | Mar. 23, 1937 | C.H. Hill | Metalworking Machine | ||