| Patents for Ashcroft Mfg. Co. |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
 | 22,157 | Nov. 30, 1858 | J.R. Brown | Pipe-Tongs |
 | 28,328 | May 15, 1860 | J.H. Parker | Hand-drill |
 | 46,981 | Mar. 28, 1865 | E.H. Ashcroft | Improved ratchet-drill |
 | 210,643 | Dec. 10, 1878 | H. Tabor | Indicator for Steam Engines, &c. |
 | 282,931 | Aug. 07, 1883 | J.W. See | Scale for Steam Engine Indicators |
 | 292,169 | Jan. 22, 1884 | W.H. MacGregor | Pressure Gage |
 | 295,694 | Mar. 25, 1884 | J.H. Vinton | Ratchet-drill |
| | 427,044 | May 06, 1890 | A.B. Calkins | Steam Engine Indicator |
| | 494,482 | Mar. 28, 1893 | W. Houghtaling | Attachment for Steam Indicators |
| | 533,812 | Feb. 05, 1895 | W. Houghtaling | Steam Engine Indicator |
