| Patents for Charles H. Douglas |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 107,346 | Sep. 13, 1870 | C.H. Douglas | Improvement in saw-tables | tablesaws |
| 236,876 | Jan. 25, 1881 | C.H. Douglas | Saw | saw teeth |
| 274,922 | Apr. 03, 1883 | C.H. Douglas | Circular saw | sawblades |
| 363,123 | May 17, 1887 | C.H. Douglas | Chain cutter for mortising-machines | mortising machines |
| 374,946 | Dec. 20, 1887 | C.H. Douglas | Chain mortising machine | mortising machines |
| 379,566 | Mar. 20, 1888 | C.H. Douglas | Chain mortising machine | mortising machines |
| 431,510 | Jul. 01, 1890 | C.H. Douglas | Saw | saw teeth |
| 555,567 | Mar. 03, 1896 | C.H. Douglas | Saw Sharperer | saw gummers |
| 603,007 | Apr. 26, 1898 | C.H. Douglas | Saw Sharpener | saw gummers |
| 1,208,521 | Dec. 12, 1916 | C.H. Douglas | Saw Sharpener | saw gummers |
