Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US137204A Inventor Walter E Thiel Original Assignee Walter E Thiel Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Crane boom load height, radius, angle, and elevation indicatorÄownload PDF Info Publication number US3073280A US3073280A US137204A US13720461A US3073280A US 3073280 A US3073280 A US 3073280A US 137204 A US137204 A US 137204A US 13720461 A US13720461 A US 13720461A US 3073280 A US3073280 A US 3073280A Authority US United States Prior art keywords boom angle indicator disc radius Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3073280A - Crane boom load height, radius, angle, and elevation indicator US3073280A - Crane boom load height, radius, angle, and elevation indicator
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