Protective headwear
Patent 4051555 Issued on October 4, 1977. Estimated Expiration Date: 
October 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2289345 3286275 3829900 Method of manufacturing improved protective headgear Safety helmet Patent #: 3946441 InventorAssigneeApplicationNo. 05/749247 filed on 12/10/1976US Classes:2/412, By diverse laminae2/425, Sport headgear2/6.6Soldier`s (i.e., ground based trooper) helmetExaminersPrimary: Guest, Alfred R.Attorney, Agent or FirmForeign Application Priority Data1975-12-19 NZAbstractA protective helmet comprising a shock absorbing shell is disclosed in which a recess is provided at the inner apex or crown portion of the shock absorbing shell and a laminated insert of padding providing for both wearer comfort and shock attenuation is placed in such recess. The design of the recess and insert to provide specific shock attenuating characteristics is described. | |
