Speaker diaphragm
Patent 5920040 Issued on July 6, 1999. Estimated Expiration Date: 
April 25, 2017. 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.
April 25, 2017. 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 1748990 1798688 1875171 1917013 2036832 2206012 2880817 2890297 3907063 Electro-acoustic transducer diaphragms InventorAssigneeApplicationNo. 845665 filed on 04/25/1997US Classes:181/167, Critically defined material or coating181/169Fibrous materialExaminersPrimary: Dang, KhanhAttorney, Agent or FirmInternational ClassG10K 013/00AbstractA diaphragm for a speaker which is adapted, to vibrate, the improvement wherein the preformed diaphragm is treated with a solution containing a polymer which readily dries at about room temperature to leave the polymer adhered to the diaphragm. | |
