After 10 years hard(close) research, the ledison team finally invented the LED filament bulb. This technology obtain 2 national invention patents, 6 utility patents, 13 appearance patents. And ledison also applied for the international patents, includeing that in the United States, Europe, Japan, Korea, Canada, Australia, Taiwan, Hong Kong, Macao and so on. And the patent applied to European Patent Office has passed. Meanwhile we applied the patent filing among the 15 Subordinate countries of European Union. Up to now ledison has obtained the international patents in Europe, Canada, Australia, Japan, Russia, Korea, Hong Kong, Macao and Taiwan.
Ledison has obtained totally 63 patents includeing the pendin patents in domestic, among them, ledison has obtained 2 invention patents, 27 new utility patents, 15 appearance patents. The quantity of the invention patent will be refreshed again and again with our improvement of the technology.