| US Patent: 507,436 
 | 
| Gas Engine | 
| 
| Patentees: |  
 | Carl F. Hirsch (exact or similar names) - San Francisco, CA |  | Adam Schilling (exact or similar names) - San Francisco, CA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Applied: | Aug. 05, 1891 |  
| Granted: | Oct. 24, 1893 |  USPTO (New site tip)
 Google Patents
 Report data errors or omissions to steward 
                        Joel Havens
 
 | 
| 
| Description: |  | Application filed 05 Aug 1891. Renewed 20 Sep 1893. |  |