| Patents for William Powell Co. |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 463,320 | Nov. 17, 1891 | J. Powell | Lubricator | steam engine lubricators |
| 533,991 | Feb. 12, 1895 | J.H. Layman | Straightway Valve | valves |
| 534,006 | Feb. 12, 1895 | J. Powell | Lubricator | steam engine lubricators |
| 604,265 | May 17, 1898 | J. Powell | Lubricator | oil pumps |
| 610,412 | Sep. 06, 1898 | J. Powell | Straightway Valve | valves |
| 754,547 | Mar. 15, 1904 | J. Desmond | Throttle-Valve | valves |
| 776,422 | Nov. 29, 1904 | J. Powell | Lubricator | oil cups |
| 812,362 | Feb. 13, 1906 | J. Powell | Construction of Oil Cups | oil cups |
| 824,882 | Jul. 03, 1906 | J. Powell | Grease Cup | grease cups |
| RE12,666 | Jun. 25, 1907 | J. Powell | Grease Cup | grease cups |
| 882,535 | Mar. 17, 1908 | J. Powell | Valve Locking Means | oil cups |
