| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for John Helm | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| XC-242 | Jun. 28, 1848 | J. Helm | Certain improvements in the construction of mills for the manufacture of lumber with circular saws | circular sawmills | |