| All Patents in class 122/437 |
Patents 1 -
5
of 5
      |
| Picture | Number | Date | Patentee | Title |
| | 186,783 | Jan. 30, 1877 | H.G. Ashton | Improvement in Safety-Valve Attachments to Utilize the Escape-Steam |
| | 197,073 | Nov. 13, 1877 | H.G. Ashton | Improvement in Safety-Valve Attachments to Utilize the Escape Steam |
| | 201,862 | Apr. 02, 1878 | H.G. Ashton | Improvement in Exhaust Mechanisms for Locomotives and Other Steam-Engines |
| | RE8,211 | May 07, 1878 | H.G. Ashton | Improvement in Safety-Valve Attachment to Utilize Escape-Steam |
| | 214,981 | May 06, 1879 | H.G. Ashton | Improvement in Safety-Valve Attachments |
