US Patent: 1,645,473 
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| Surface test indicator
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	        Patentee:
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 | Alfred George Cash (exact or similar names) - Rochester, NY |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
Jan. 17, 1927 | 
 
| Granted: | 
Oct. 11, 1927 | 
 
 
 
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                        Joel Havens 
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        Description: |  
| "The feature of this invention is the construction of the indicator so that a reading may be obtained from either side or face of the indicator..." |  
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