Vented helmet and face shield
Patent 4141085 Issued on February 27, 1979. Estimated Expiration Date: 
September 22, 1997. 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.
September 22, 1997. 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 3423758 3496854 3517393 3783450 3925821 Protective helmet and ventilating system therefor Patent #: 4081865 InventorApplicationNo. 05/835715 filed on 09/22/1977US Classes:2/410, For wearer's head2/424, And face2/436By ventilation of shieldExaminersPrimary: Rimrodt, Louis K.Attorney, Agent or FirmInternational ClassesA42B 3/04 (20060101)A42B 3/28 (20060101) AbstractA safety helmet has a plurality of air vents formed therein in mutually spaced relation. A face shield is affixed to the helmet and has a plurality of air vents formed therein in mutually spaced relation. | |
