US Patent: 2,825,307 
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| Hydraulic control system
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	        Patentees:
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 | Duane B. Enyeart (exact or similar names) - Sidney, Shelby County, OH |  
| Nagle V. Gusching (exact or similar names) - Sidney, Shelby County, OH |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
Jan. 19, 1956 | 
 
| Granted: | 
Mar. 04, 1958 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for Monarch Machine Tool Co. 
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        Description: |  
| Note: The patent specification lists the first patentee as Duane B. Enyear. The drawing and other documents list it as Duane B. Enyeart. |  
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