| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Allen Johnston | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 465,376 | Dec. 15, 1891 | A. Johnston | Means for Grinding Cutlery or Other Articles | sharpening apparatus | |
| 465,478 | Dec. 22, 1891 | A. Johnston | Grinding Machine | sharpening apparatus | |
| 485,697 | Nov. 08, 1892 | A. Johnston | Art of Grinding Cutlery or Other Tempered Steel Articles | sharpening apparatus | |