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