Surface acoustic wave transmission device and method of manufacturing same
Patent 4051448 Issued on September 27, 1977. Estimated Expiration Date: 
September 27, 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.
September 27, 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 3781721 3878407 3887887 InventorAssigneeApplicationNo. 05/550036 filed on 02/14/1975US Classes:333/151, Spurious signal or mode cancellation means29/25.35, PIEZOELECTRIC DEVICE MAKING310/312, Adding or subtracting mass310/313B, Interdigitated electrodes310/313R, Surface acoustic wave devices333/194Including spurious signal prevention or reduction meansExaminersPrimary: Chatmon, Saxfield Jr.Assistant: Nussbaum, Marvin L. Attorney, Agent or FirmForeign Application Priority Data1974-02-15 FRAbstractThe present invention relates to the manufacture of surface acoustic wave transmission devices. The invention provides a method of cutting the edges of surface acoustic wave devices, which consists in directing on to that face designed to propagate said waves, a jet of abrasive particles. | |
