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Leadholder or Related Patent Thumbnail Index |
 http://leadholder.com/pat-us02857883-1954-apsco_tripoint.html |
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date of application date granted inventor assignee patent holder country |
1954 October 12 1958 October 28 Edmund C. Pratt – United States |
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| patent employed on |
 Apsco Tri-Pointer |
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