US Patent: 2,835,172 
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| Rotary Head Milling Attachment
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	        Patentees:
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 | Orrin W. Barker (exact or similar names) - New Berlin, Waukesha County, WI |  
| Ralph E. Saving (exact or similar names) - Wauwatosa, Milwaukee County, WI |  
| Lloyd D. Libby (exact or similar names) - Minneapolis, MN |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Jan. 13, 1955 | 
 
| Granted: | 
May 20, 1958 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for Kearney & Trecker Co. 
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