US Patent: 742,549 
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| Metal column, girder, or structure
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| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
Aug. 04, 1903 | 
 
| Granted: | 
Oct. 27, 1903 | 
 
 
 
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                        Jeff Joslin Vintage Machinery entry for Niagara Machine & Tool Works Vintage Machinery entry for Zeh & Hahnemann Co. 
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        Description: |  
| Co-inventor Edmund Zeh was an employee of Niagara Machine & Tool Works, and would eventually move to Newark and co-found power press maker Zeh & Hahnemann Co. |  
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