US Patent: 2,503,590 
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| Truck crane
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	        Patentee:
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 | Arwin E. Ormsby (exact or similar names) - Oakland, CA |  
 
 
 
 
 
 
 
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        Patent Dates:
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| Applied: | 
Jun. 02, 1947 | 
 
| Granted: | 
Apr. 11, 1950 | 
 
 
 
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                        Jeff Joslin 
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        Description: |  
| This patent and 2,549,120, "other patents pending", were seen on a Model 50 Blue Heron Crane from Blue Heron Crane Co. |  
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