| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Charles E. Trowbridge | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
| 127,121 | May 21, 1872 | C.E. Trowbridge | Improvement in Tools for Grooving the Rings of Spinning Frames | ||
| 133,344 | Nov. 26, 1872 | C.E. Trowbridge | Machines for Manufacturing Rings for Spinning Machines | ||