| Patents for Ashcroft Mfg. Co. |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 22,157 | Nov. 30, 1858 | J.R. Brown | Pipe-Tongs | pipe tongs |
| 28,328 | May 15, 1860 | J.H. Parker | Hand-drill | ratchet drills |
| 46,981 | Mar. 28, 1865 | E.H. Ashcroft | Improved ratchet-drill | ratchet drills |
| 210,643 | Dec. 10, 1878 | H. Tabor | Indicator for Steam Engines, &c. | steam engine indicators |
| 282,931 | Aug. 07, 1883 | J.W. See | Scale for Steam Engine Indicators | steam engine indicators |
| 292,169 | Jan. 22, 1884 | W.H. MacGregor | Pressure Gage | steam pressure gauges |
| 295,694 | Mar. 25, 1884 | J.H. Vinton | Ratchet-drill | ratchet drills |
| 427,044 | May 06, 1890 | A.B. Calkins | Steam Engine Indicator | steam engine indicators |
| 494,482 | Mar. 28, 1893 | W. Houghtaling | Attachment for Steam Indicators | steam engine indicators |
| 533,812 | Feb. 05, 1895 | W. Houghtaling | Steam Engine Indicator | steam engine indicators |
| 538,042 | Apr. 23, 1895 | W. Houghtaling | Steam Engine Indicator | steam engine indicators |
| 538,043 | Apr. 23, 1895 | W. Houghtaling | Steam Engine Indicator | steam engine indicators |
| 646,700 | Apr. 03, 1900 | W. Houghtaling | Steam Engine Indicator | steam engine indicators |
| 963,986 | Jul. 12, 1910 | F.C. Blanchard | Combination drill and valve-grinder | eggbeater drills |
