| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Ridgway Dynamo & Engine Co. | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 603,475 | May 03, 1898 | J. Stumpf | Cut-off mechanism for steam-engines | steam engine valves | |
| 1,045,630 | Nov. 26, 1912 | J. Stumpf | Unidirectional-flow steam-engine | steam engines | |
| 1,285,475 | Nov. 19, 1918 | W. Turnwald | Automatic exhaust-valve | steam engine valves | |