-1 for example Substances 0.000 description 2.239000011358 absorbing material Substances 0.000 description 3.238000006011 modification reaction Methods 0.000 description 4.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Leonard P Frieder filed Critical Leonard P Frieder Priority to US787917A priority Critical patent/US2983923A/en Application granted granted Critical Publication of US2983923A publication Critical patent/US2983923A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US787917A Inventor Jackson A Aileo Original Assignee Leonard P Frieder Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Rigging for protective helmetĭownload PDF Info Publication number US2983923A US2983923A US787917A US78791759A US2983923A US 2983923 A US2983923 A US 2983923A US 787917 A US787917 A US 787917A US 78791759 A US78791759 A US 78791759A US 2983923 A US2983923 A US 2983923A Authority US United States Prior art keywords shell head headstrap rigging pad Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2983923A - Rigging for protective helmet
US2983923A - Rigging for protective helmet
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