| US Patent: 1,794,361 
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| Milling-Machine Spindle and Tool | 
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| Patentees: |  
 | Joseph B. Armitage (exact or similar names) - Milwaukee, Milwaukee County, WI |  | Edward J. Kearney (exact or similar names) - Wauwatosa, Milwaukee County, WI |  | Benjamin P. Graves (exact or similar names) - Providence, Providence County, RI |  | Lester F. Nenninger (exact or similar names) - Cincinnati, Hamilton County, OH |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Mar. 25, 1927 |  
| Granted: | Mar. 03, 1931 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for Brown & Sharpe Mfg. Co
 "Vintage Machinery" entry for Kearney & Trecker Co.
 "Vintage Machinery" entry for Cincinnati Milling Machine Co.
 "Vintage Machinery" entry for W. H. Nichols Co.
 
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| Description: |  | This joint patent is for the standardized spindle tapers and tooling. 
This patent number was seen on a Cincinnati Milling Machine Co. patent plate 4FV-101. |  |