| US Patent: 193,437 
 | 
| Improvement in machines for grinding mower and reaper knives | 
| 
| Patentees: |  
 | Edward J. Worcester (exact or similar names) - Worcester, MA |  | Vernon F. Prentice (exact or similar names) - Worcester, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
 | 
| Patent Dates: |  
| Applied: | Jun. 18, 1877 |  
| Granted: | Jul. 24, 1877 |  USPTO (New site tip)
 Google Patents
 Report data errors or omissions to steward 
                        Jeff Joslin
 Vintage Machinery entry for E. J. Worcester
 
 | 
| 
| Description: |  | In 1877 E. J. Worcester was operating under his own name and Vernon F. Prentice was establishing Prentice Bros. with Benjamin W. Prentice. |  |