Invention patent "Invention"in Chinese Patent Law means any new technical solution relating to a product.a process or improvement thereof ·carbon filament lamp Process for making certain drug Method for producing tubular lamp bulb N0.:2000118899.20r2000810003.1 2023/12/12 Tongji-Taolue Zhang 16Invention patent • "Invention" in Chinese Patent Law means any new technical solution relating to a product, a process or improvement thereof • carbon filament lamp • Process for making certain drug • Method for producing tubular lamp bulb No.:2000118899.2 or 2000810003.1 2023/12/12 Tongji - Taolue Zhang 16