US Patent: 3,634,661 
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| Data Processing Method for Minimizing Potential Errors Occurring During Linear and Circular Interpolation
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	        Patentee:
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 | Arthur O. Fitzner (exact or similar names) - Fond Du Lac, Fond Du Lac County, WI |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Sep. 26, 1968 | 
 
| Granted: | 
Jan. 11, 1972 | 
 
 
 
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                        Joel Havens "Vintage Machinery" entry for Giddings & Lewis Manufacturing Co. 
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        Description: |  
| Abstract
Successive linear or circular arc path segments are represented by successive "blocks" of data. A corrective change is made in the data block representing a given path segment if the preceding path segment did not terminate exactly at its designated end point. |  
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